tickseed coreopsis won't bloom - Ask Extension
I have a wildly spreading bunch of seemingly healthy tickseed coreopsis. The plants look really good but this is the second year that it is not bloom...
Knowledgebase
tickseed coreopsis won't bloom #873605
Asked June 18, 2024, 12:28 PM EDT
I have a wildly spreading bunch of seemingly healthy tickseed coreopsis. The plants look really good but this is the second year that it is not blooming. I have had it 10 years and most years it has done well.
Hennepin County Minnesota
Expert Response
Amount of sunshine is a key factor. They must have 6-8+ hours of sunlight. With the crowding they may not get that. I would thin them out. You could also get a soil sample to determine if your soil is lacking anything.
https://soiltest.cfans.umn.edu/
https://soiltest.cfans.umn.edu/
Is it possible they have a disease? Someone suggested Aster Yellows but the plant looks good except for the fact that the buds never open.
Thanks for your help!
Susan
Deformed flowers are a more common sign. And there are usually other problems as well. See the following website for more detailed information.
https://extension.umn.edu/plant-diseases/aster-yellows
https://extension.umn.edu/plant-diseases/aster-yellows