The mountain planting and care calendar

A guide to revisit year after year. This calendar gathers the possible tasks, month by month, without setting fixed dates. For what actually happened in a given season, with month and year, read the garden journal. The steps for sowing and pricking out are explained separately in Sowing and seedlings.

In my garden in Bran, in Romania’s Brașov County, the weather and the plants have become the calendar I go by.

Spring can be late, cold nights can come back when the garden already seems awake, and fall can bring frost before I’ve finished all the work. The months below are guidelines for organizing, not deadlines that hold every year or in every mountain garden.

My garden’s year has four key periods: nature waking up in April and May, the warmer months from June to August, the garden settling in September and October, and dormancy from November to March.

Each month I keep track of planting and sowing, pruning, feeding and plant health, protection and, separately, the roses. Tasks for vegetables and fruit trees are extra pointers, where they fit into the garden. The calendar also includes the flowers from my collection of Agrosem seeds, as a guide for organizing sowing from one year to the next.

Before any work in the garden, I check the forecast, the moisture and the condition of the soil, then the plant’s needs. Swollen buds don’t cancel the risk of hard frost, and a warm afternoon doesn’t mean the soil has warmed enough. I use USDA zone 6a/6b as a rough guide for the garden. It describes winter cold, not the date of the last frost, and every corner has its own microclimate. For tender seedlings, the right temperature for the species and the risk of frost matter more than a fixed date in May.

Month by month, at a glance

Plant protection: This calendar isn’t a spray schedule. I choose products only after identifying the problem, for the plant and the authorized use, following the dose, intervals, protective equipment and restrictions for children, animals and pollinators. I don’t mix products without compatibility instructions. ²

The garden wakes up in April and May

Spring starts with observation and work done in the right weather windows. Sometimes April allows planting, other times I have to wait. I don’t try to catch up by working wet soil or hardening off seedlings too early.

April

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Planting and sowing: When the soil has thawed and crumbles without sticking to the tools, hardy shrubs and perennials can be planted, including container-grown ones. Indoors, the sowing time is counted back from the date the plants can safely go outside. Zucchini and cucumbers grow fast; I don’t start them many weeks before I can move them out. Flowers have different rhythms, and the instructions on the packet still matter. From my Agrosem seeds, April is the last window for the species usually started earlier indoors – Echinacea, Delphinium, Leucanthemum, Gaillardia and scabiosa – if I didn’t manage to sow them in February or March. This is also when I sow nasturtiums, morning glories and ornamental gourds directly in the bed. Lupines and poppies, which dislike being moved, are best sown exactly where they’ll grow. Mint, thyme and tarragon, which do well for me, are also divided and moved now, while the soil is moist and the plants can settle in easily.

Pruning: I remove broken or dead branches. Shaping cuts are chosen by species, not applied to the whole garden on the same day. Shrubs that bloom on the previous year’s wood are usually trimmed after flowering. On plums and cherries I avoid spring pruning; the timing depends on the tree’s age and the type of work. ¹

Feeding and plant health: When growth resumes, I can add mature compost or well-rotted manure, not just dried. I use bagged dried cow manure, crushed eggshells and coffee grounds in moderate amounts, along with mulch from tree prunings and mowing. But I don’t consider them a substitute for mature compost. Fertilizer is chosen according to the plant’s needs and the soil’s fertility; I don’t layer products without checking what they contain. I don’t schedule a general treatment for every plant. I start with observation, hygiene and diagnosis, and any plant-protection product is used only for its authorized use in Romania, according to the label. ²

Protection: I check for snails and slugs from the first wet spells and protect tender growth. No method keeps slugs away all season — baits last only a few days, so I alternate with barriers around tender seedlings and an evening round with a flashlight, when they’re most active. I keep frost cloth on hand, but in hard frost I move tender plants under cover. The lawn is mowed when it’s growing actively and the soil can take being walked on; repairing bare patches waits for conditions that suit germination.

Roses: For repeat-flowering roses, April can be the right time for the main pruning, if the weather and the stage of the buds allow. I remove frost-damaged wood back to healthy tissue and open up the bush without trimming every type the same way. Once-flowering roses and some climbers follow a different calendar. The mound is taken down gradually as the soil thaws, and feeding starts when the plant resumes growing. ³

Potted roses bought from a nursery I plant from April, when the soil and weather allow. Potted plants offer more flexibility than bare-root ones, which are planted while dormant. I avoid frozen, waterlogged or very dry soil. Spring planting gives them time to root, but blooming depends on the variety, the plant’s condition and the weather; it isn’t guaranteed earlier than with a plant bought later. ⁴

Plants grown under cover can have tender shoots. I get them used to the outdoors gradually and protect them from cold wind. When planting, I follow the nursery’s instructions for the type of rose, the graft union and the site’s drainage; depth isn’t set by altitude alone. I carefully loosen roots circling the edge of the pot, without breaking them needlessly. ⁴

May

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Planting and sowing: I keep planting hardy perennials and hardening off seedlings, with gradual exposure to sun and wind. Tender plants go into the bed only when nights and soil are warm enough and the forecast shows no frost. In the mountains I may have to wait until the end of May or even into June. Frost cloth offers limited protection; it doesn’t turn a cold spell into a safe one for every seedling. ⁵ Any Zinnia and Cosmos still left to sow can go directly outside, and Sweet William finds its place in the bed. Being biennial, in its first year it mostly makes foliage, and the flowers usually come the following year. This is also when I plant the summer-blooming species that can’t take frost: gladiolus corms, dahlia tubers and tuberous begonias. Dahlias started in pots go outside only after the last frost; in cold years in Bran, planting can even happen in June. I choose a sunny, sheltered, well-drained spot and follow the depth and spacing given for each species. ¹²

Pruning: I remove spent flowers from spring bulbs, but let the leaves yellow naturally so they rebuild their reserves. Shrubs that have finished their spring bloom can get corrections suited to the species. Beforehand I check for active nests and put off the work where I’d disturb the birds.

Feeding and plant health: I check the leaves, including the undersides, the shoots and the buds. On roses, downy mildew is the disease I watch most closely now. The cool, wet mountain weather favors it, so I often check the undersides of the leaves and the young shoots, where the first symptoms can appear. I don’t spray the whole garden at the first aphids or spots. Watering at the base, opening up the bushes and removing diseased tissue reduce the risk. If a treatment is justified, I follow the diagnosis, the label and local plant-health warnings. I feed according to the pace of growth, without excess. ²,⁶

Protection: Freshly planted seedlings are vulnerable to slugs and to the mix drying out. I check daily at first, especially after rain. For beds that need to warm up, I wait to top up the mulch until the soil is no longer cold. I put it on moist soil, without burying the crown or touching the stems, keeping a gap of at least 5 cm (2 in).

Roses: I watch the new shoots and buds, but I don’t assume all the bushes start at the same time. On grafted roses, shoots from the rootstock are removed at their point of origin, once positively identified. Not every vigorous shoot from the base is a sucker: it may be valuable growth of the variety. ³

Summer from June to August

Summer brings periods of fast growth and blooming, but it doesn’t have the same rhythm every year. In a mountain garden, drought, wind or cold, rainy weeks can change the work from one day to the next.

June

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Planting and sowing: Planting is still possible in June, especially container-grown plants, on cool days and if I can water them often until they settle in. I sow suitable species in succession and keep track of the time left until blooming or harvest. For plants that propagate this way, I can take softwood cuttings from healthy shoots. Among garden flowers, this is when I sow pansies and English daisies, both biennials, with next year in mind, and, if I’m running late, wallflowers.

Pruning: Removing spent flowers can extend the bloom of some species, but it isn’t necessary for all of them. I keep the flower heads I want seeds from. I trim only the shrubs for which after-flowering is the right time; I don’t apply a general ban on summer pruning.

Feeding and plant health: Plants with a long bloom may need extra feeding, depending on the product already used and the condition of the soil. After rain I check the foliage more closely. I don’t repeat treatments after every rain: the interval, rainfastness and maximum number of applications are those on the label. ²,⁶

Protection: I check the moisture before watering and direct the water to the soil, preferably in the morning. Recently moved plants may need temporary shade and shelter from wind. I stake tall stems early and check the ties so they don’t tighten as the plants grow.

Roses: The first big flush of flowers can start now or later, depending on the weather and the variety. On repeat-flowering roses I remove spent flowers if I’m aiming for another bloom. Feeding after the first flush can help when the plant needs it, without exceeding the product’s dose or frequency. ⁷

July

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Planting and sowing: I avoid moving plants during heat waves or droughts. I can sow biennials, like foxglove and Sweet William, for blooms the following year, according to the variety’s instructions. For fall vegetables I choose crops with a short enough growing time; some seeds germinate poorly in heat and need a cooler spot.

Pruning: I keep removing spent flowers where it helps and cut out diseased parts. Summer pruning on trees or shrubs remains specific to each species, not a general shortening of every branch.

Feeding and plant health: For roses and other shrubs that need to ripen their shoots before winter, I plan to end stimulating feeds toward the end of summer. Annuals and container plants may have different needs. I don’t apply products to drought-stressed plants, and I follow the temperature and mixing restrictions on the label; there’s no universal threshold for every sulfur formulation. ²,⁸

Protection: For well-rooted plants, watering that soaks the root zone deeply is more useful than repeated shallow sprinkling. Seedlings, sowings and containers, though, need checking more often. I top up the mulch where it has thinned and watch the water running down the slope, so it reaches the plant, not just the lower part of the garden.

Roses: I note which varieties keep their foliage healthy and how they respond to heat, rain and where they’re planted. I don’t judge a variety’s toughness by a single beautiful flower or a single season.

August

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Planting and sowing: Toward the end of the month, if it cools down and the soil has moisture, I can resume planting hardy species. Biennials sown in summer need time to form a strong root system before winter. Late sowings of hardy annuals, including snapdragons, remain an experiment that depends on the variety and protection, not a guaranteed success in the mountains. Semi-ripe cuttings are chosen by how mature the shoot is. It’s also the alternative window for the perennials I usually start indoors in spring – Echinacea, Delphinium, Gaillardia, lupines, yarrow, Centranthus and red or oriental poppies. Sown now, directly outside, they get the winter cold they need to germinate, instead of stratification in the fridge.

Pruning: I avoid hard pruning that would force new growth before the weather cools. On roses that form decorative hips, I can keep the last flowers. That choice doesn’t replace proper preparation for winter and doesn’t, on its own, stop the plant from growing. ⁷

Feeding and plant health: I reduce or stop stimulating nitrogen on woody plants, according to their pace and how long the fertilizer lasts. Many people say “no nitrogen after August 15.” I look more at the plant and the weather. I watch for powdery mildew and other foliage problems; air humidity, air circulation and the variety’s susceptibility matter, not just the dew.

Protection: I harvest ripe seeds in dry weather, label them and keep them dry. With hybrids, offspring from seed can differ from the parent plant. I check the seedlings sown in summer and prick them out once they’re developed enough, without waiting for them to get crowded.

Roses: Preparing for winter starts by avoiding overfeeding and keeping the foliage as healthy as possible. You can try cuttings from suitable shoots, but rooting varies between varieties; young plants will need protection in their first winter.

The garden settles in September and October

Fall can offer a good time for planting, but in the mountains the window sometimes closes much too quickly. I prioritize hardy plants that are developed enough. For tender or poorly rooted plants, or for spots with difficult drainage, spring can be the safer choice.

September

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Planting and sowing: I plant hardy perennials and shrubs while the soil is still suitable for rooting and there’s time left before the lasting freeze. I water after planting and check the moisture afterward. End-of-season sales can be useful, but I choose healthy plants, not just cheap ones. I start planting spring bulbs when the soil cools but isn’t frozen. Daffodils, crocuses and hyacinths usually go in first, in September and October; I leave tulips for October or November. Hardy summer-blooming bulbs, like lilies, alliums and crocosmia, can also be planted in September and October. I choose firm bulbs, without mold or soft spots, and a well-drained spot. As a guide, most go in at a depth of two to three times the bulb’s height, tip up, but I check each species’ needs. In heavy soil I avoid holes where water stands; well-drained pots can be an alternative. This is also when the fall sowing of the perennials mentioned in August can be finished, while the soil still allows. ¹²

Pruning: I avoid trimming without identifying the plant. Macrophylla and serrata hydrangeas often form flower buds on older wood; paniculata and arborescens follow a different pruning regime. With clematis, the group and bloom time matter. For clematis whose group I don’t know yet, I prefer to watch it bloom for a season before pruning. The hydrangea types in the garden are described in their own profile. In September I usually limit myself to necessary corrections and cleanup, without trimming every hydrangea or clematis the same way. ⁹,¹⁰

Feeding and plant health: I don’t push roses and shrubs that are getting ready for dormancy with nitrogen. I add potassium only if there’s a real need. The lawn has its own schedule: repairing bare patches is done early, if there’s time left for germination and rooting. I choose a suitable mix and don’t add sand to heavy soil without checking that it’s an appropriate fix.

Protection: I watch the forecast for cold nights and prepare the overwintering spots. I keep checking for slugs in wet spells. I harvest fruit at the right ripeness. Healthy apples and pears I store in the cellar, and some I turn into juice. I photograph the beds before the top growth disappears, so I know where I can work the following year.

Roses: I tie long canes to their support before strong winds. I remove only the parts that are broken, diseased or impossible to secure; I keep the healthy canes of the climbers. The timing of shaping cuts depends on the type of rose. With cuttings taken now, I watch how mature the wood is and provide protection over winter.

October

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Planting and sowing: I carry on only while the soil and forecast offer good conditions. For plants that are only marginally hardy or not rooted enough, I prefer to wait until spring. I keep planting spring bulbs, especially tulips. There’s no single deadline for every species: the type of bulb, drainage and whether the soil is frozen all matter. If I bought the bulbs later, I plant them as soon as possible, after checking them and removing any that are soft or rotting. Seeds that need cold stratification can be sown in drained, labeled containers, protected from rodents, standing water and drying out completely. ¹²

Pruning: I remove diseased parts and broken stems. Where it makes sense, I leave healthy stems and seed heads as shelter for insects and food for birds. I don’t move all pruning to the dormant season: for some plants that isn’t the right time.

Feeding and plant health: I gather diseased leaves from under the roses and don’t put them in my cold home compost. Healthy leaves can be used separately. I don’t apply fertilizers to stimulate growth in dormant plants; improving the soil with mature organic matter is decided separately, based on the condition of the ground. ⁶

Protection: As the soil cools, I add the winter protection suited to each plant, without a wet, compact layer over the crown. I don’t over-mulch ground that stays waterlogged. I drain automatic watering systems, hoses and exposed faucets before frost can damage them.

Roses: I prepare the materials for hilling up, but I don’t close the plants in warm, wet protection too early. I choose the time after the cold weather sets in and the plants go dormant. I gather diseased leaves and check the climbers’ ties.

From my journal: I wrote about what I did in the garden this month in The garden in October.

Dormancy from November to March

In the cold months the work thins out, but the garden doesn’t need the same protection everywhere. Snow can insulate the soil, while its weight can break branches. Frost without snow, wind and too much water each call for attention in different ways.

November

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Planting and sowing: If the soil stays unfrozen and well-drained, some hardy dormant plants can still be planted. I don’t force late plantings once winter sets in. For suitable species, I can take hardwood cuttings in a well-drained mix and a sheltered spot; rooting isn’t guaranteed.

Pruning: I limit myself to broken or dangerous branches and the necessary cleanup. Shaping work is planned by species and weather, not just by when the leaves fall.

Feeding and plant health: I don’t feed dormant plants for growth. I clean and maintain the tools, check the leftover products and store them according to the label, away from children and animals. I don’t pour leftover products or solutions down the drain or onto the soil. ²

Protection: I anchor windbreaks and breathable covers. Containers have roots more exposed to frost than plants in the ground; I group them under shelter and insulate the containers, keeping the drainage clear. Evergreens are checked for lack of water during frost-free spells, especially if the fall was dry.

Roses: For plants that need protection, I hill up after the cold sets in, with loose, well-drained material brought from elsewhere, without exposing the roots. The height of the protection is adapted to the plant, the position of the graft and the nursery’s recommendations. Tree roses and container roses have different needs than a bush planted in a bed.

December

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Planting and sowing: I don’t work frozen or waterlogged soil. I check the containers of seeds being stratified: they need the conditions the species requires, including the right moisture, not just exposure to cold.

Pruning: I don’t start a program of big pruning jobs for every tree and shrub. Apples and pears can have some work done while dormant, on mild days, but in a cold place it’s wise to avoid major work before hard frosts. Plums and cherries aren’t pruned in winter. ¹

Feeding and plant health: I take a break from feeding dormant plants. I check the bulbs, tubers and plants stored under cover and remove anything that has spoiled.

Protection: I carefully remove heavy snow from flexible branches, without hitting or forcing the frozen wood. I don’t try to knock ice off branches. I check the protection after wind and avoid walking on frozen lawn.

Roses: I check the mounds, supports and how the protection is secured. I don’t water if the ground is frozen and I don’t keep the plant wrapped airtight in plastic.

January

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Planting and sowing: In January I sow only slow-growing plants, like petunias, verbenas, salvia and lobelia, and only if I can give them light, warmth and room until planting out. For many flowers and vegetables, a later start is better than months of crowded growth indoors. ⁵

Pruning: I plan the work suited to each species. I don’t prune in frost, and I don’t tackle heavy or dangerous branches without qualified help.

Feeding and plant health: In the garden, dormant plants don’t need extra food. It’s a good time to take stock of seeds, review notes and choose plants suited to each spot, before ordering for the new season. This is also when I reread the labels on my more than 80 rose bushes and replace the faded or fallen ones, while I still have patience for fiddly work.

Protection: I check whether rodents have gnawed the bark of young trees and whether the tree guards are too tight on the trunk. I check the containers under shelter and the moisture of the mix on frost-free days.

Roses: I keep the right protection in place. Broken branches that threaten to injure the plant or fall need a separate assessment, not an automatic wait until April.

February

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Planting and sowing: I start long-season seedlings only if the time until planting out matches their needs. For many seedlings, extra lighting for about 14–16 hours a day can help, with a daily dark period. The distance from the lamp is set by its type and power, not by a universal rule of 10–20 cm (4–8 in). ⁵ It’s also the month when I start most of my flower seeds on the windowsill: China asters, snapdragons, phlox, flowering tobacco and cineraria, along with longer-season perennials like Echinacea, Delphinium, Leucanthemum, Gaillardia, scabiosa and wallflowers. Many just need scattering on the surface, without covering, so I always check the packet before burying them out of habit.

Pruning: Apples and pears can be pruned toward the end of dormancy, if the weather allows. It isn’t necessary to finish all the work in February. For stone fruits and early-blooming shrubs, I choose the time that suits the species. ¹

Feeding and plant health: I use ash rarely, because it raises soil pH and doesn’t suit plants that love acidic soil. I use it only when justified, from untreated wood and in a controlled amount. Copper treatment isn’t universal either: the crop, the problem, the stage and the application conditions have to match the label. ²,¹¹

Protection: Sun and wind can increase water loss in evergreens when the roots can’t replace it. Breathable screens, suitable mulch and avoiding drought before the freeze complement each other; none of these measures offers absolute protection. I don’t water frozen ground.

Roses: I adapt the pruning dates from calendars for milder areas. I watch the forecast and the buds. In a cold spring, the main pruning may happen in April or later; in a warmer year, the timing gets reassessed.

March

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Planting and sowing: I let the soil thaw and dry out. I don’t work it while it sticks to the tools, to avoid compaction. Indoors I schedule tomatoes and medium-season flowers according to the weeks needed until transplanting, not just because calendar spring has arrived. This is also when I continue indoors with yarrow, Centranthus, campanula, Monarda, Zinnia and Cosmos. Outside, if the soil allows, cornflowers, poppies, chamomile, Godetia, alyssum and gypsophila can be sown directly, among the few that aren’t scared of a passing chill.

Pruning: I gradually clean up the areas where growth is starting, without stripping the whole garden of healthy debris in one day. Shrubs that bloom on the current year’s growth may need spring pruning; first I identify the species and check the risk of cold.

Feeding and plant health: In very cold soil, root activity is reduced, not completely absent in every species. I avoid feeding on snow or on frozen or waterlogged soil. I wait for conditions that let the plant use the nutrients and check whether feeding is needed.

Protection: I gradually vent or remove the protection as the weather softens, and keep it close in case the frost returns. Not all hardy bulbs need covering, but buds and tender growth may need protection in a sharp cold snap.

Roses: I gradually take down the mound as the soil thaws, without suddenly exposing the base of the bush before another cold spell. I check the shoots and decide on pruning by the type of rose, the plant’s stage and the weather.

How I use this calendar

I don’t see it as a list of obligations. At the start of each month I choose two or three tasks that really matter that year. A cold, rainy season doesn’t call for the same work as a dry one, and a new plant has different needs than a well-rooted one.

In a notebook I record the date of the work, the plant, the spot in the garden and what happened afterward. The dates of the last frost I observed, the first fall frost, plantings and winter losses are especially useful. That way I compare years without assuming every task shifts by the same number of weeks. In the mountains, the weather keeps rewriting the calendar.

How do you organize your year in the garden?

Is there a task you do differently from what the calendars say? Tell me in the comments.

Sources for the general recommendations

Horticultural guidelines consulted on September 19, 2026. Dates from British and North American sources aren’t carried over as fixed deadlines for Bran; the months are adapted to local observations and the forecast. These sources don’t determine whether a product is approved in Romania. The notes on Agrosem flower seeds come from my own experience and from the seed packets I bought, not from the numbered sources below.

1. RHS on pruning plums
2. Romania’s National Phytosanitary Authority on product authorization
3. RHS on pruning roses by type
4. RHS on planting roses
5. University of Minnesota Extension on growing seedlings
6. RHS on rose black spot
7. RHS on rose care
8. University of Minnesota Extension on roses in a cold climate
9. RHS on pruning hydrangeas
10. RHS on clematis pruning groups
11. RHS on using wood ash in the garden
12. RHS on planting bulbs · Growing dahlias