Rain Lily

Rain lilies are bulbs of the genus Zephyranthes, in the amaryllis family, Amaryllidaceae. They are native to the Americas and have been grown in Indian gardens for so long that most people think of them as local. Other English names include zephyr lily, fairy lily and rain flower. They are not true lilies.

The plant forms a tuft of narrow, glossy, grass-like leaves that stay green through the warm months. After a shower, slender stems push up from the bulbs and each opens a single upward-facing flower with six petals, rather like a crocus. Three types are common in Indian nurseries:

• Pink (Zephyranthes carinata and Z. rosea). Rose-pink flowers, 4–7 cm across, the largest and showiest of the three.
• White (Zephyranthes candida). Crisp white flowers, 3–5 cm across, on a tighter clump that looks tidy even when out of flower.
• Yellow (Zephyranthes citrina). Smaller, bright yellow flowers, less often sold.

What makes it special is the timing. A clump can sit quietly for weeks, then open dozens of flowers at once two to four days after a heavy shower. That sudden carpet of colour is why it is one of the best-loved rainy season flower plants in Bengal.

Where should you grow rain lilies?

Somewhere sunny and outdoors, where you can see the flush when it comes.

• Pots and bowls. A wide, shallow pot 15–20 cm deep suits it well, because the bulbs like to be crowded. It is one of the most rewarding easy to grow plants for balcony corners that catch morning or midday sun.
• Terraces. Its small size and light weight make it one of the best minimal plants for terrace gardens, where it can edge larger pots or fill a trough.
• Borders and beds. Planted in a row along a path or lawn edge, it gives a neat green line all season and a band of colour after every rain. It is among the most dependable flowers for small gardens because it spreads slowly without taking over.
• Under shrubs and trees. Plant it in the bare soil below a flowering shrub or small tree, where the grassy leaves cover the ground.

It is not an indoor plant. Without direct sun it makes leaves but rarely flowers.

Product Specifications

• Plant name: Rain Lily (Zephyranthes) Plant
• Botanical name: Zephyranthes spp.
• Common names: Rain lily, zephyr lily, fairy lily, rain flower
• Plant family: Amaryllidaceae (amaryllis family)
• Origin: The Americas
• Plant type: Flowering bulb (perennial)
• Foliage: Narrow, glossy, grass-like leaves, 20–30 cm long
• Flower: Single, star-shaped, six-petalled, upward-facing, 3–7 cm across
• Flowering season in India: Flushes from May to October, mainly after rain
• Flower life: One to two days per bloom; repeat flushes through the season
• Growth habit: Clump-forming; spreads slowly by offsets
• Suitable placement: Sunny balcony, terrace, border, bed edge, shallow pot or under shrubs outdoors
• Light requirement: Four to six hours of direct sun; tolerates part shade with fewer flowers
• Water requirement: Moderate in the growing season; low in winter; never waterlogged
• Soil requirement: Light, sandy-loamy and free-draining, with some compost
• Temperature: Grows best between 20 °C and 35 °C; protect from frost and cold wind below about 5 °C
• Fertiliser: Half-strength balanced liquid feed monthly from April to September, or bone meal and compost in spring
• Maintenance: Low
• Difficulty level: Easy
• Suitable environment: Warm, humid Indian plains and coastal regions with good sun. Not suited to indoor rooms.
• Pet safety: Low-risk, not pet-safe; bulbs toxic if eaten

How do you care for rain lily bulbs?

• Sunlight. Four to six hours of direct sun a day. On the plains it copes with full afternoon sun, as long as the soil does not dry to dust.
• Watering. From May to October, water when the top 2–3 cm of soil feels dry. Keep it drier in winter, watering only enough to stop the pot drying out completely. If a clump stops flowering in the monsoon, let the pot dry for a week or two, then water deeply; flowers usually follow within a few days.
• Soil. A light, free-draining mix: two parts garden soil, one part compost or leaf mould and one-part coarse sand. Bulbs rot in heavy, waterlogged clay.
• Planting depth. Set bulbs 2–3 cm deep, with the neck at or just below the surface, about 3–5 cm apart. Buried too deep, they grow leaves but do not flower.
• Feeding. Feed once a month from April to September with a balanced liquid fertiliser at half strength or scatter a spoonful of bone meal and compost in spring. Too much nitrogen gives lush leaves and few flowers.
• Dividing. Leave clumps alone for two or three years; they flower best when crowded. Divide in February or March, before the new season, and replant the offsets straight away.

When does rain lily flower in India?

From May to October, in flushes. The first flowers often open after the pre-monsoon storms of May, and the main show runs through the monsoon from June to September, with a last flush after October rain. Each bloom lasts one or two days, but a mature pot can flower a dozen times in a season.

In south India and coastal regions with two rainy seasons, it may also flower during the winter showers. Rain is the usual trigger, but a deep watering after a dry spell works almost as well, so a potted clump can be coaxed into flower even in a dry week.

A season with rain lilies in Bengal

These notes come from growing zephyranthes in the open beds of our Kolkata nursery.

March to May: waking up. New leaves appear as the days warm. Feed once and water whenever the soil dries. The first kalbaishakhi storms of April and May often bring the first flowers, which are among the earliest flowers that grow in summer from a bulb.

June to September: the rains. This is the peak. Clumps flower again and again, often two to four days after each heavy spell. Make sure pots drain freely, because standing water rots bulbs. Watch for snails, which eat the flowers at night, and for the striped caterpillar of the lily borer moth, which chews the leaves; pick them off by hand. The monsoon guide on which flowers grow in rainy season suggests other plants to flower alongside it.

October to November: last flowers. Late rain brings a final flush. Cut back on watering as the weather cools and stop feeding.

December to February: rest. Growth slows and some leaves yellow. In Bengal most clumps stay partly green; in north India they may die back to the bulb. Keep pots on the dry side, protect them from frost and cold wind below about 5 °C, and wait for spring.

Why is my rain lily not flowering? Common problems and fixes

• Plenty of leaves, no flowers. Too much shade, bulbs planted too deep, heavy nitrogen feeding or soil kept constantly wet. Move it into sun and try a dry spell followed by a deep soak.
• Newly planted or divided bulbs not flowering. Normal. Disturbed bulbs often skip a season while they settle.
• Soft, mushy bulbs and yellow leaves in the rains. Waterlogging. Repot into a sandier mix in a pot with good drainage holes and discard any rotten bulbs.
• Leaves chewed to stubs. Lily borer caterpillars. Pick them off, and spray neem oil or a bacterial spray if the attack is heavy.
• Holes in flowers overnight. Snails and slugs. Collect them after dark and keep the base of the pot clear of fallen leaves.
• Leaves yellowing in winter. Natural rest. Reduce watering and let the plant be.

Is rain lily safe for pets and children?

It is low-risk but not pet-safe. The ASPCA lists only the giant rain lily (Zephyranthes drummondii) as non-toxic to dogs and cats and has no entry for the pink and white types sold in India. The bulbs of this family contain alkaloids such as lycorine, which can cause vomiting, drooling and stomach upset if eaten. The leaves and flowers are much less of a concern than the bulbs. Keep pots where dogs cannot dig and call a vet if a pet eats a bulb. The plant is not for eating.

What to grow with rain lilies

These bulbs look best at the feet of taller plants that enjoy the same sun. A red hibiscus to stand behind the rain lilies gives height and colour through the same season. Plant a champa tree to shade the bed and fill the bare soil beneath it with a ring of white or pink bulbs. For a border, plant vinca along the dry edge of the bed and keep the rain lilies in the moister strip beside it.

Colour that arrives with the rain

Order a pot now and let the next monsoon do the rest. Every pot is grown at our own nursery and packed upright, so the leaves and bulbs arrive intact. Looking for more colour? Browse our range of mini flower plants for pots, balconies and gardens.