Spring is the kindest season for houseplants, and the one when most of the year's useful work gets done. Days lengthen, light strengthens, and plants that sat quietly through winter start growing again, which makes spring the right time to repot, resume feeding, prune straggly growth and deal with any pests that built up indoors over winter. It is also the season when the temptation to move plants outdoors is strongest, and the season when a single cold night can undo months of care. This guide walks through the spring routine for common houseplants — when to repot, how to restart feeding and watering, how to move plants outside gradually, and what to watch for as growth resumes. Frost dates are averages and vary by place, so check your local extension service before moving any tender plant outdoors for the night.
Reading the signs of spring growth
The first sign of spring in a houseplant is usually new growth at the tips: small, pale leaves unfurling, a stem lengthening, or a plant that was dormant pushing out a fresh shoot from the base. Roots are the other signal — roots circling the drainage holes, water running straight through the pot, or a plant that dries out within a day of watering are all signs that the pot is full. Do not repot on the calendar alone; repot when the plant shows it needs it, and do the job in spring so the plant has the whole growing season to settle into its new pot.
Spring light is stronger than winter light, and plants that spent winter in a dim corner may need to be moved closer to a window, but not into harsh direct sun all at once. A plant moved straight from a shaded shelf to a sunny sill can scorch, so move it in stages over a week or two. Turn pots a quarter-turn each week so growth stays even, and wipe dust off leaves with a damp cloth so the plant can use the extra light. The sunlight calculator can help you check whether a spot gets the light a particular plant needs.
Repotting in spring
Choose a new pot only one size larger than the old one — a pot that is too large holds wet compost around roots that cannot use it, and root rot follows. Use fresh potting mix suited to the plant: a free-draining mix for most houseplants, a chunkier bark-based mix for orchids and aroids, and a very gritty mix for cacti and succulents. Water the plant the day before repotting so the rootball holds together, ease it out gently, and tease away only the loose old mix from the outside of the rootball. Trim any black, soft or foul-smelling roots with clean snips, and set the plant at the same depth it was growing before.
After repotting, water thoroughly and let the pot drain completely, then place the plant in bright indirect light and leave it alone for a week or two while it settles. Do not feed a freshly repotted plant for three or four weeks, because fresh mix already contains nutrients and the roots need time to grow into it. Some plants, such as snake plants and ZZ plants, prefer to be slightly pot-bound and may only need repotting every two or three years, while fast growers such as monstera and pothos may need it every spring. The repotting calculator and the potting mix calculator can help with pot size and mix quantities.
Watering and feeding as growth resumes
As light and warmth increase, houseplants use more water, and the winter habit of watering sparingly needs to change. Check the soil with a finger rather than watering on a fixed schedule: water when the top few centimetres feel dry for most plants, and let the mix dry out more for cacti, succulents and snake plants. Water thoroughly until it runs from the drainage holes, then empty the saucer so the plant is never standing in water. Tap water left out overnight is gentler on sensitive plants such as calatheas, which can react to chemicals in fresh tap water with brown leaf edges.
Restart feeding in spring once you see active new growth, using a balanced liquid fertiliser at half the strength on the label, applied every two to four weeks through the growing season. Feeding a plant that is not yet growing, or feeding at full strength on dry soil, can burn roots, so always water first and feed second. Plants that were repotted in fresh mix do not need feeding for a few weeks. If leaves are pale or growth is weak despite feeding, check light and watering first — those are the usual causes, and fertiliser cannot fix a plant that is too dark or too wet.
Moving houseplants outdoors — gradually
Many houseplants enjoy a summer outdoors, but the move must be gradual, in a process called hardening off. Start by placing plants in a sheltered, shady spot outdoors for a few hours on a mild day, and bring them back in at night. Over one to two weeks, increase the time outdoors and the amount of light, until the plant can stay out all day and, once night temperatures are reliably mild, all night. Never move a houseplant outside before the last frost in your area, and never put a plant that has lived indoors all winter straight into full sun — the leaves will scorch within hours.
Outdoors, houseplants need more water than indoors because wind and sun dry the mix faster, so check pots daily in warm weather. Choose a spot sheltered from strong wind, and keep plants off the ground where slugs and soil pests can reach them easily. Tropical plants such as monstera, philodendron and calathea are the most sensitive to cold and should be the last to go out and the first to come back in. If a cold night is forecast after plants are outside, bring them in or cover them — one night below freezing can kill a tropical plant outright. For the season ahead, see our summer houseplant care guide.
Spring pests and pruning
Spring is when indoor pests that built up over winter become visible: fungus gnats hovering over damp soil, spider mites leaving fine webbing and speckled leaves on plants in dry heated rooms, and mealybugs hiding in leaf joints as white cottony clumps. Inspect the undersides of leaves and the soil surface when you repot, and deal with problems early — a shower for the plant, a wipe with a damp cloth, or removing the worst-affected leaves will handle most early outbreaks. Letting the top of the mix dry between waterings is the best control for fungus gnats.
Prune straggly growth in spring, when the plant has the energy to respond with new shoots. Cut back leggy stems to just above a leaf node, remove yellowed or damaged leaves, and take cuttings from healthy prunings if you want to propagate. Clean, sharp scissors or snips make a clean cut that heals quickly, and wiping the blades between plants stops pests and disease spreading. Do not prune a plant that is stressed, newly repotted or not yet growing — give it a few weeks to settle first. The pest identifier helper can help you identify what you are seeing.
A spring houseplant checklist
Work through the routine in order: inspect every plant for pests and dead leaves, repot the ones that need it, move plants to brighter spots in stages, restart watering to match the new growth, and begin feeding once growth is active. Then, and only then, start hardening off the plants you plan to move outdoors, watching the forecast every evening. Keep a note of which plants you repotted and when, because a plant repotted this spring will not need it again next spring, and a plant that struggled will tell you what to change.
Spring houseplant care is mostly about timing and restraint: repot when the plant needs it, feed when it is growing, and move it outdoors only when the weather is genuinely ready. Plants that get that gentle, well-timed start will grow strongly all summer and come back indoors in autumn in better shape than they left. Browse the guides hub for the seasonal guides, and use the watering schedule generator to build a routine that fits your collection.
Frequently asked questions
When should I repot houseplants in spring?
Repot in spring when the plant shows it needs it — roots circling the drainage holes, water running straight through, or the plant drying out within a day. Use a pot only one size larger, fresh mix suited to the plant, and wait three to four weeks before feeding after repotting.
When can I move houseplants outside?
Only after the last frost in your area, and only after hardening them off over one to two weeks — a few hours in shade at first, building up to full days outdoors. Check your local extension service for average last frost dates, and bring plants in if a cold night is forecast.
Why are my houseplant leaves turning yellow in spring?
The most common causes are overwatering as you increase watering too fast, or a plant adjusting to stronger light. Check the soil with your finger before watering, move the plant to brighter light gradually, and remove yellow leaves so you can see whether new growth is healthy.
How often should I feed houseplants in spring?
Once you see active new growth, feed every two to four weeks with a balanced liquid fertiliser at half the label strength, always on moist soil. Plants in fresh potting mix do not need feeding for the first few weeks after repotting.
What are the tiny flies around my houseplants?
They are almost certainly fungus gnats, which breed in damp potting mix. Let the top of the mix dry out between waterings, remove dead leaves from the soil surface, and water from below where possible. The problem usually fades once watering is under control.