Top Questions About Coreopsis Plants

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Questions About Coreopsis Plants

Asked by
Nauticawest on
June 14, 2014

Q. Why isn’t my Coreopsis growing in its second season?

Last spring I planted two Perennial Coreopsis and they bloomed beautifully. I deadhead the spent blooms and the two plants continued to thrive all summer through fall. I cut the plants to the ground for the winter. This spring-2014- both Coreopsis begin to show life with green shoots sprouting in May. Now, in the midde of June the two Coreopsis’ haven’t grown or expanded at all. How long should I continue to hold out for their additional growth and subsequent blooms of yellow flowers? Our winter here in Michigan was extremely cold; along with a cold spring. Could this be a reason why the plants are taking longer to shoot up and bloom. Or, should I consider the Coreopsis’ to be a bust? And plant new ones? Please advise. Thank you!

Answered by
theficuswrangler on
June 15, 2014
A.

There are so many varieties of coreopsis, some are annual and some are perennial, and some are much more winter hardy than others. The winter could certainly have affected them in some way. At best, they last only 2 -5 years, so the weather may have hastened their old age. I think I would plant some different varieties, but leave those, in case they recover after some extra time. Here's some general information on these beautiful flowers: https://www.gardeningknowhow.com/edible/fruits/oranges/growing-an-orange-tree.htm

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Asked by
s.lines.cs on
June 14, 2015
Illinois

Q. How do i deadhead coreopsis?

Do I cut the flower off at the top or bottom of the stem?

Answered by
roseman on
June 14, 2015
A.

We trim ours off as far back towards the main plant as possible. More blooms will come in fairly sort order too!

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Asked by
biglar on
June 15, 2015
south central Pennsylvania

Q. how to deadhead coreopsis grandiflora-tickseed

Do I simply pull off the head of the flower (like a marigold), or do I remove the entire stem (like a geranium)? Also, where can I purchase various coreopsis seeds? Thank-you!

Answered by
Downtoearthdigs on
June 15, 2015
Certified Expert
A.

I like to trim mine down to the next leaf structures.

I use a small sharp garden scissors and it makes a nice clean cut.

https://www.gardeningknowhow.com/ornamental/flowers/coreopsis/growing-coreopsis-flowers.htm

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Asked by
Anonymous on
June 20, 2015

Q. bud worms in coreopsis

We have these small worms inside our coreopsis buds eating them from the inside. Have had coreopsis for many years and have never had a problem with pests. Can you tell us what to do about them?

Answered by
Heather on
June 21, 2015
Certified Expert
A.

This article should help, though it's directed to roses it would still apply to your situation as well: https://www.gardeningknowhow.com/ornamental/flowers/roses/budworms-roses.htm

If it is not budworms but another caterpillar or worm pest attacking your plant, then they can be treated with products containing Bacillus thuringiensis (Bt), a natural bacteria that kill worms without harming plants. Neem oil may be helpful as well. Here is more information: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/using-bacillus-thuringiensis.htm
https://www.gardeningknowhow.com/problems/pests/neem-oil-uses.htm

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Asked by
sheilag on
August 25, 2015
Indiana

Q. Can I replant this fall and move back to original place in spring

I want to dig up my plant and reset in another bed until spring. The original bed is in terrible condition and I want to tear it out and redo it in the fall. I do not want to lose my Coreopsis, as I love its yellow flowers.

Answered by
Downtoearthdigs on
August 27, 2015
Certified Expert
A.

Coreopsis should do well being moved this fall. Prepare the temporary bed and move the plants. Water the plants well for the first 2 weeks, then you can cut back. Mulch around the plants for moisture retention and winter protection.

https://www.gardeningknowhow.com/ornamental/flowers/coreopsis/growing-coreopsis-flowers.htm

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Asked by
Anonymous on
September 13, 2015

Q. Can I grow coreopsis and blanket flowers together?

Can I grow a coreopsis and blanket flower together?

Also, what can I grow in my area code? I love my garden! I have Bird of Paradise, white ginger, dahlias from seed, broccoli, bok choy, and lots of mint. I also have plenty of moon flowers.

Answered by
Downtoearthdigs on
September 15, 2015
Certified Expert
A.

Your growing zones are 10-11, making it possible for you to grow a number of plants--many of these year round. You can grow coreopsis and blanket flower together, as well as all the other plants you mentioned. As long as they all share the same or similar growing requirements, these plants can be grown together in the garden.

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Asked by
Anonymous on
April 25, 2016

Q. Tickseed Coreopsis

What do you do with the Tickseed Coreopsis flower before winter sets in? I have just planted the Tickseed Coreopsis flowers and I want to know what to do with the plants before winter. Should I cut them back to ground level or just let them alone?

Answered by
Downtoearthdigs on
April 26, 2016
Certified Expert
A.

According to my research cutting down tick seed coreopsis may decrease their chance of winter survival and risk the plant putting on new growth using energy reserves intended for spring. So, I would recommend leaving them alone.

For more information on coreopsis, please visit the following link:
https://www.gardeningknowhow.com/ornamental/flowers/coreopsis/growing-coreopsis-flowers.htm

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