Cleome is a magnificent annual that produces large pink, white or violet blooms.
Key Cleome facts, a short list
Name – Cleome spinosa
Family – Cleomaceae (formerly Capparaceae)
Type – annual
Height – 32 inches to 5 feet (80 cm to 1.5 meters) depending on the variety
Exposure – full sun
Soil: rich and well drained – Flowering: all summer → early fall
Cleome blooms over all of summer. Also called spider plant, it belongs to the same family as the caper bush.
Cleome is grown in temperate climates as an annual, because it cannot withstand temperatures below 17°F (-8°C).
You’ll have to sow your cleome seeds every year, either directly in the ground from April onwards, or a bit earlier under cover followed by transplanting to the flower bed in May.
You can sow in a tray as early as March and April which will let you transfer the strongest seedlings to a nursery pot before the final transplanting, when the climate is most suited to the plant’s growth.
Cleome, when planted in pots, is more vulnerable to the dryness of the soil, and must be watered more often but in moderate amounts.
You can also stake the longest stems if they tend to collapse.
Cleome handles drought quite well and doesn’t fear diseases which makes it an easy plant to care for.
Once well settled in, you’ll only have to water in case of prolonged dry spell or heat wave.
Staking the stems might be necessary if they start bending over.
Lastly, remove wilted flowers regularly in order to stir the plant into bearing more flowers.
Cleome is native to South America and Africa depending on the variety. Over 120 species are included in the genus, the most common of which is Cleome spinosa, the spider flower.
One usually appreciates cleomes for the large pink, white or purple fragrant flowers, and the palmate green-colored leaves that are also very ornamental.
This not-so-hardy plant is very easily grown and even reseeds itself from one year to the next.
Whether in the ground or on a terrace, avoid drafts because cleome stems will fold and easily fall over.
