What's your question? Ask

Butterfly Bushes

Q.Help With Our Black Knight Butterfly Bush

Zone Ottumwa, Iowa 52501 | Anonymous added on June 17, 2022 | Answered

We planted our Black knight butterfly bush seven weeks ago, on the west side of our house, it gets 6-7 hours of sunlight. It started out with a bang, with big blooms but they died off fast and the new ones don’t seem to be as big even as small as about an inch and they die off??? We have watched several you tube videos with conflicting ideas to really water to only water 2 times a week or less? to fertilize and not to fertilize?? we are just wondering if you have any tips or ideas for us, we are so confused about the watering issue. It has been steadily in the high 80’s to low 90’s for the past few weeks. I hope you may have some suggestions for us? Thank you.

A.Answers to this queston: Add Answer
Certified GKH Gardening Expert
Answered on June 27, 2022

I've grown a Black Knight before and it got tall but not very full. Butterfly bushes rarely need fertilizer so be careful with that. They need to be pruned almost to the ground in late winter. You can choose whether to deadhead; they look tidier if you do. Well draining soil is important so they don't get root rot. Once established, they only need to be watered during dry spells.


Was this answer useful?

Log in or sign up to help answer this question.

Did you find this helpful? Share it with your friends!

You must be logged into your account to answer a question.

If you don't have an account sign up for an account now.

Looking for more?
here are more questions about...
Butterfly Bushes
Join Us - Sign up to get all the latest gardening tips!

Do you know a lot about gardening?
Become a GKH Gardening Expert