Why Are The Coreopsis Dying?

I planted Jethro Tull coreopsis about a month ago. They are starting to brown and die, starting with the innermost leaves. What am I doing wrong? I have been watering every 3 days using drip irrigation (1 gph for 1 hour).

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1 Comment To "Why Are The Coreopsis Dying?"

#1 Comment By BushDoctor On 05/26/2021 @ 1:21 pm

This looks like a bacterial infection, likely, from a little too much water.

Rather than watering on schedule, make sure to water when the soil dries out down to about 3 inches, thoroughly. I would even say to let them go even longer than that, though. They are a drought tolerant wildflower, and they will not tolerate overwatering. \

These articles will help:

https://www.gardeningknowhow.com/ornamental/flowers/coreopsis/growing-coreopsis-flowers.htm ^[1]

https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm ^[2]

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-moisture-in-plants.htm ^[3]

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URLs in this post:

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

[2] https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm: https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm

[3] https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-moisture-in-plants.htm: https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-moisture-in-plants.htm

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