Weeping Willow in March: monthly care
Month-by-month care — Salix babylonica
In March your weeping Willow needs attention: plant / sow, fertilise and watch the bloom.
- Plant / sow
- Fertilise
- Blooms

What to do this March
Weeping willows thrive in full sun and need a position with plenty of space—mature trees reach 10–20 metres tall with a spread of 8–15 metres, so plant at least 10 metres from buildings, boundaries, and other large trees. They are ideal for waterside planting near ponds, streams, or damp areas of the garden, as their roots naturally seek moisture. Avoid planting near drains, sewers, or foundations; willow roots are vigorous and can cause structural damage. Choose a site with clay, loam, or peat-based soil. Weeping willows tolerate heavy, waterlogged ground better than most trees, but they also grow well in any moisture-retentive soil. Avoid dry, sandy, or shallow soils. Plant bare-root or container-grown trees in October, November, or March when the ground is workable and not frozen. Autumn planting is preferable, giving roots time to establish before spring growth. Dig a hole twice the width of the root ball and the same depth. Break up compacted soil at the base and sides. Position the tree so the soil mark on the stem sits level with the surrounding ground—planting too deep can lead to rot. Backfill with the excavated soil, firming gently as you go to eliminate air pockets. Water thoroughly immediately after planting, even if the soil is already damp. Stake young trees with a single angled stake driven in at 45 degrees, using a flexible tree tie to allow some movement, which encourages strong root development. Apply a 7–10 cm layer of organic mulch (well-rotted compost or bark) around the base, keeping it clear of the trunk. Water generously during the first growing season to help establishment.
Weeping willows have high water needs and perform best in consistently moist or even wet soil. Water young trees deeply and regularly during their first two years, especially from April to September. Established trees near natural water sources usually need no supplementary watering, but those in drier spots benefit from thorough soaking during prolonged dry spells in summer. Avoid letting the root zone dry out completely. Feed in March and April with a balanced general-purpose fertiliser or a slow-release tree and shrub feed applied around the drip line (the outer edge of the canopy). A 5 cm top-up of organic mulch such as well-rotted manure or compost in early spring also provides nutrients and helps retain moisture. Avoid high-nitrogen feeds after mid-summer, as soft late growth is vulnerable to frost. Weeping willows are fully hardy across zones 4a–9b and need no winter protection. They naturally drop their leaves in autumn; rake these up if they smother smaller plants, but leaving some as mulch benefits soil life. Common problems include aphids, which cause sticky honeydew and sooty mould on foliage in spring and summer—spray with an insecticidal soap if infestations are severe. Willow anthracnose (a fungal disease) can cause dark spots and early leaf drop in wet seasons; improve air circulation through pruning and clear fallen leaves promptly. Canker and dieback sometimes affect stressed or waterlogged trees; prune out affected branches and improve drainage if possible. Weeping willows are generally robust but grow fast, so monitor for structural issues and keep the base clear of weeds and grass competition.
Weeping willows have high water needs and perform best in consistently moist or even wet soil. Water young trees deeply and regularly during their first two years, especially from April to September. Established trees near natural water sources usually need no supplementary watering, but those in drier spots benefit from thorough soaking during prolonged dry spells in summer. Avoid letting the root zone dry out completely. Feed in March and April with a balanced general-purpose fertiliser or a slow-release tree and shrub feed applied around the drip line (the outer edge of the canopy). A 5 cm top-up of organic mulch such as well-rotted manure or compost in early spring also provides nutrients and helps retain moisture. Avoid high-nitrogen feeds after mid-summer, as soft late growth is vulnerable to frost. Weeping willows are fully hardy across zones 4a–9b and need no winter protection. They naturally drop their leaves in autumn; rake these up if they smother smaller plants, but leaving some as mulch benefits soil life. Common problems include aphids, which cause sticky honeydew and sooty mould on foliage in spring and summer—spray with an insecticidal soap if infestations are severe. Willow anthracnose (a fungal disease) can cause dark spots and early leaf drop in wet seasons; improve air circulation through pruning and clear fallen leaves promptly. Canker and dieback sometimes affect stressed or waterlogged trees; prune out affected branches and improve drainage if possible. Weeping willows are generally robust but grow fast, so monitor for structural issues and keep the base clear of weeds and grass competition.