Why Are My Gypsophila Leaves Curling?

Aphid infestation

Aphids are the most common pest on gypsophila. They cluster on the fine, wiry stems and the small, narrow leaves, particularly at the shoot tips and around the developing flower clusters. Because gypsophila has very fine foliage and stems, the damage from aphids is often not obvious until the shoot tips have already curled and become distorted. Green and black aphids are both found on gypsophila. Heavy infestations before flowering reduce the quality and quantity of the cutting material produced.

What to do

• Inspect the shoot tips closely for aphid colonies, which may not be immediately visible on the fine stems.
• Spray with insecticidal soap every four to five days for two to three weeks. Cover the fine stems and shoot tips thoroughly.
• A strong jet of water helps dislodge aphids from the wiry stems, though the fine structure of the plant makes complete coverage with water alone difficult.
• Avoid high-nitrogen feeds which produce soft, lush growth that is especially attractive to aphids.

Crown rot and root rot

Crown rot and root rot are the most serious problems for gypsophila and one of the most common causes of plant failure in UK gardens. Gypsophila is exceptionally sensitive to waterlogged soil: in heavy clay, in poorly draining beds, or in containers where water pools around the crown, the roots and the crown deteriorate rapidly. The symptoms appear above ground as wilting and curling of the fine leaves, often accompanied by yellowing, and the plant may collapse suddenly even when the soil appears moist. The crown at soil level turns brown and soft, and a sour smell may be present.

What to do

• Plant gypsophila in very well-drained, preferably alkaline or chalky soil. It thrives in the conditions that many plants find too dry and poor.
• Avoid planting gypsophila in heavy clay or in any position where water sits for more than a few hours after rain.
• In containers, use a very gritty compost and ensure excellent drainage holes. Water sparingly and only when the compost is dry.
• On heavy soils, raise the planting site with a mound of gritty, well-drained soil or grow in raised beds. Never mulch gypsophila with moisture-retentive material around the crown.
• Plants that have developed crown rot rarely recover and should be removed. Improve drainage before replanting.

Drought stress

Despite its love of well-drained conditions, gypsophila still needs adequate moisture during active growth and flowering. In very free-draining, sandy soils during prolonged dry spells, the fine leaves curl and the plant may stop flowering prematurely. Annual gypsophila in containers is particularly vulnerable to drying out, as the shallow root system cannot access deeper moisture. The challenge with gypsophila is maintaining consistent moisture without ever allowing the soil to become waterlogged.

What to do

• Water gypsophila during prolonged dry spells but always allow the soil surface to dry between waterings. Never keep the soil consistently moist.
• Annual gypsophila in containers needs more frequent attention: water when the top 2 to 3 cm of compost feel dry and ensure excess water drains away immediately.
• Deep watering less frequently encourages the deep root development that makes established perennial gypsophila drought tolerant.

Spider mite

Spider mite occasionally affects gypsophila in hot, dry conditions, particularly under glass or in very sheltered, warm positions outdoors. The fine leaves develop a bronzed or stippled appearance, curl, and fine webbing appears between the stems in more severe cases. Because gypsophila already has very fine, light-coloured foliage, spider mite damage can be subtle and easy to overlook until it is well advanced.

What to do

• Examine the fine stems and leaves under magnification if you suspect spider mite: the tiny mites and their eggs are visible on the undersides of leaves and between stems.
• Spray with insecticidal soap or neem oil every five to seven days for four to six weeks.
• Increase humidity around the plant: spider mites thrive in hot, dry conditions and are inhibited by regular misting of the foliage.

Acid soil

Gypsophila is strongly calcicole, meaning it thrives in alkaline or neutral soil and performs poorly in acid conditions. In acid soil below pH 6, the plant develops yellowing, curling leaves and poor, weak growth despite adequate watering and feeding. The soil pH affects the plant's ability to absorb essential nutrients including iron and manganese. This is the most commonly overlooked cause of poor gypsophila performance in UK gardens with naturally acid soil.

What to do

• Test the soil pH before planting gypsophila. If the pH is below 6.5, apply garden lime in autumn or winter according to the test recommendations to raise the pH.
• On very acid soils, grow gypsophila in containers of neutral to slightly alkaline compost blended with horticultural lime.
• Do not apply ericaceous compost or fertilisers to gypsophila: these are formulated for acid-loving plants and will make the problem worse.

Frequently asked questions

Why are my gypsophila leaves curling?

Gypsophila leaves curl most often from aphid infestation or crown rot. Aphids cluster on the fine stems and small leaves, causing them to curl and distort. Crown rot caused by Phytophthora or other pathogens in wet, poorly drained soil causes the whole plant to wilt, and the narrow leaves curl and yellow as the crown deteriorates.

Why is my gypsophila wilting and dying?

A gypsophila that wilts suddenly despite moist soil is likely suffering from crown rot or root rot, caused by overwatering or poorly drained conditions. Gypsophila is extremely sensitive to waterlogging and the crown deteriorates quickly in wet soil. Examine the crown at soil level: if it is brown, soft, or smells sour, root rot has set in and the plant is unlikely to recover.

How do I get gypsophila to flower more?

Cut perennial gypsophila back by one third after the first flush of flowers in early summer to encourage a second flush later in the season. Grow gypsophila in full sun and well-drained, chalky or alkaline soil for the best flowering. Annual gypsophila sown in succession from March to June produces a continuous supply of cutting material through summer.

Can I grow gypsophila in pots?

Annual gypsophila can be grown in pots with good results if the compost is very free-draining and watering is careful. Perennial gypsophila is best in the open ground where it can develop its deep tap root. Both types need excellent drainage: use a gritty compost in containers and ensure the pot has large drainage holes.