Cosmos Topple Over - Knowledgebase Question

Annapolis, MD
Question by Leah40
June 22, 2001
I love my cosmos but every year they grow so tall that they end up toppling over and making and untidy mess--although they bloom beautifully. What is the reason for this? Why do some bloom when they are 14" high and others grow and grow and grow before they will bloom?


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Answer from NGA
June 22, 2001

0

These plants need full sun all day long and grow best on a lean soil--meaning not an overly rich soil. Hold back on fertilizer--some compost added at planting time may provide enough nutrients for the season. There are cosmos varieties that remain relatively short; you may want to try these instead of the ones that grow 4-plus feet tall. Check variety descriptions carefully.

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