Free Shipping on All Orders Over $100 until August 1st

Growing Cleome

Growing Cleome

Queen Mixed Cleome



Cleome is a vigorous, upright tender annual with attractive, spidery flowers that are attractive to butterflies and hummingbirds. Prefers full sun to light shade and well-drained soils. It is sometimes called spider flower. It is an excellent plant for the back border and for screening.

How To Grow

Cleome seed can be somewhat challenging to start indoors, as it prefers warm days and cool nights. Seed can be started indoors 4 to 6 weeks before the last expected spring frost. Cooler night temperatures can be provided during germination by keeping trays on a heating mat plugged into a timer that turns off at night. Ideal germination temperatures are 70 degree days and 55 degree nights. Do not cover the seed, as light is beneficial for germination.

Seed can also be direct sown outdoors 1 to 2 weeks after last spring frost, when soil has warmed. Cover the seed only slightly when sowing outdoors.


Easy-to-grow plants that are heat and drought-tolerant. Excellent background plants for an annual screen. Supporting plants with stakes may be helpful in windy sites. Can pinch at transplant to make plants bushier. May reseed in the garden if developing seed pods are not removed.

Fertilizer Recommendations

Cleome benefits from regular fertilization. Use full rates of ALGOplus Flowering Plant 4-6-7 liquid fertilizer, Neptune Fish & Seaweed Fertilizer 2-3-1, or Osmocote slow-release 14-14-14.

Common Problems

Cleome is generally not troubled by pest and disease problems. Aphids, spider mites, and whiteflies occasionally attack plants. Powdery mildew and rust sometimes infect plants.

Alternative Products

Other tall flowering annual plants for screening include castor bean and Purple Majesty Hybrid ornamental millet.

Product Recommendations

Sowing in Plantable 2-1/4" Round Jiffy Peat Pots can improve transplant success. Cleome is a good background plant and combines well with shorter flowering annuals like geranium and shorter varieties of zinnia and marigold. Insect and mite pests can be treated with Captain Jack's Deadbug Brew and diseases can be combated with 70% neem oil.

Cleome Facts

Cleome is native to South America.


Do you have specific questions related to your garden? Email and let our years of expert experience help your garden grow!

Growing Tips