Spring watering is a balancing act. The soil is still cool and dries slowly, rain is frequent, and plants are only just starting to grow — so most of the garden needs less water than you think. At the same time, newly sown seed, seedlings and fresh plantings dry out quickly on a sunny spring day, and a single dry spell can kill them. The skill of spring watering is to water the plants that need it, when they need it, and to leave the rest alone. This guide explains how to judge spring watering, how much different plants need, and the mistakes that cause the most damage.
How spring watering differs from summer watering
In summer, the rule is simple: water deeply and regularly, because hot sun and active growth dry the soil fast. In spring, the soil is cool, evaporation is low, and plants are using little water, so the same routine causes waterlogging. Overwatering in spring is the most common watering mistake of the year: it keeps the soil cold and airless, rots seeds before they germinate, and causes root rot in plants that are only just waking up. The spring rule is to check the soil before watering, every time, and to water only when the top inch or two has dried.
Check by pushing a finger into the soil: if it is moist an inch down, do not water. If it is dry, water thoroughly, so the water soaks down to the roots rather than wetting only the surface. Shallow, frequent watering encourages shallow roots that suffer in the first dry spell, while deep, infrequent watering encourages roots to grow down. The watering calculator helps you work out a routine for your soil and plants. Check your local extension service if you are unsure how much water your soil type needs in spring.
Watering seed, seedlings and new plantings
Newly sown seed needs the soil surface to stay moist until germination, which is the one exception to the spring rule of watering sparingly. Water seed beds gently with a fine rose or a mist, so the seed is not washed away or buried, and cover the bed with fleece if the weather turns dry and windy. Once seedlings emerge, reduce watering so the surface dries slightly between waterings — this encourages roots to grow down and reduces the risk of damping off, the fungal disease that kills seedlings in damp, still conditions.
Seedlings raised indoors and hardened off need watering before they go out and immediately after planting, so their roots make contact with the soil. Water new plantings thoroughly at planting time, then water again only when the soil dries — a newly planted shrub or perennial needs regular watering for its first few weeks, because its roots have not yet grown into the surrounding soil. Our spring transplanting guide covers the move outdoors, and our spring seed starting guide covers raising seedlings. Mulch around new plantings to hold moisture — see our spring mulching guide — but keep mulch away from the stems.
Watering established plants, lawns and containers
Established perennials, shrubs and trees usually need no watering at all in spring unless the weather is unusually dry, because winter rain has filled the soil and their roots reach deep. Water them only if the soil is dry several inches down and the plant is showing signs of stress, such as wilting in the afternoon. Lawns need little water in spring: the grass is growing in cool, moist soil, and watering a spring lawn encourages shallow roots and disease. Our spring lawn care guide covers the details. Wait until the weather warms and the soil dries before watering a lawn regularly.
Containers are the exception. Pots and hanging baskets dry out far faster than the ground, because they hold a small volume of compost and are exposed to wind and sun on all sides. Check containers daily in spring, especially small pots and those in sunny, windy spots, and water when the top inch of compost is dry. Water until it runs from the drainage hole, then empty the saucer so the plant is not standing in water. Houseplants moved outside for the summer need the same attention, and our houseplants seasonal care guide explains their spring routine.
When to water, and how
Water in the morning in spring, so the soil warms up during the day and leaves dry before nightfall. Watering in the evening in cool spring weather leaves leaves wet overnight, which encourages slugs and fungal disease, and leaves the soil cold. Water the soil, not the leaves: a watering can with a rose held low, a soaker hose, or drip irrigation all put water where the roots are. Overhead watering wastes water, wets leaves unnecessarily, and in spring can spread disease from plant to plant.
Use rainwater where you can: it is soft, slightly acidic, and free of the salts and chemicals in tap water, and plants prefer it. A water butt connected to a downpipe is the simplest way to collect it. If you use tap water, let it stand overnight so it reaches air temperature — cold water on warm spring soil shocks young roots. In a dry spring, prioritise: new plantings and seedlings first, vegetables second, and established shrubs and lawns last, because they can cope with a dry spell better than anything newly planted.
Signs of over- and underwatering in spring
Overwatering in spring shows as yellowing leaves, wilting despite wet soil, a sour smell from the soil, and seedlings that collapse at soil level. The fix is to stop watering, improve drainage, and let the soil dry — do not feed an overwatered plant, because it cannot use fertiliser until its roots recover. Underwatering shows as wilting in the afternoon that recovers overnight at first, then wilting that does not recover, dry and crispy leaf edges, and seed that fails to germinate. The fix is to water deeply and thoroughly, and to mulch to hold the moisture in.
The most dangerous spring watering mistake is watering on a schedule rather than checking the soil. A fixed routine — every day, or every Monday — ignores the weather, the soil and the plant, and in a wet spring it waterlogs the garden while in a dry spring it leaves seedlings thirsty. Check the soil, look at the plant, and water when the garden needs it. If you are unsure, check your local extension service for watering advice for your soil type and climate.
Frequently asked questions
How often should I water the garden in spring?
As often as the soil needs it — check with a finger an inch down, and water only when it is dry. In a normal spring, established plants need little or no watering, while seed beds and containers need regular checks.
Should I water seedlings every day in spring?
Seed beds need the surface kept moist until germination, then watering should be reduced so the surface dries slightly between waterings. Water gently so seed is not washed away.
Is it better to water in the morning or evening in spring?
Morning. Leaves dry before nightfall, the soil warms during the day, and wet leaves overnight encourage slugs and fungal disease.
Why are my seedlings wilting even though the soil is wet?
Probably damping off or root rot from overwatering in cool soil. Let the soil dry, improve air movement, and do not water again until the surface dries.
Do I need to water the lawn in spring?
Usually not. Spring soil is moist and grass grows in cool conditions. Wait until the weather warms and the soil dries. If you are unsure, check your local extension service for advice.