My cosmos, grown from seed, have been enormous, over 6ft tall, very late flowering with stems like a sapling. Unfortunately the wind has blown them over despite staking. How have others fared? they have been far too tall for the border and overwhelmed other plants .
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My cosmos, grown from seed, have been enormous, over 6ft tall, very late flowering with stems like a sapling. Unfortunately the wind has blown them over despite staking. How have others fared? they have been far too tall for the border and overwhelmed other plants .
Try this more recent thread:
http://www.gardenersworld.com/forum/problem-solving/cosmos-very-tall/1003403.html