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?

Answer from NGA
June 22, 2001


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.

You must be signed in before you can post questions or answers. Click here to join!

« Return to the Garden Knowledgebase Homepage

Member Login:



[ Join now ]

Today's site banner is by dirtdorphins and is called "Cedrus atlantica"