Ask a Question forum→tall phlox

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New Haven, CT (zone 7)
Jun 13, 2020 9:45 AM CST
One of my garden phlox plants loses it lower leaves ---they turn yellow , curl up, and fall off-- year after year. A plant pathologist was unable to identify any insect or fungus affecting the plant. I have divided it and transplanted a portion to another pot where it did the same thing. I have tried to limit watering, tried it in different areas of the garden (it's potted) with different degrees of sun exposure. I have sprayed it with insecticidal soap and insecticides/fungicides without apparent effect. The plant still blooms but on stems that are 3/4 leaf-free. Another phlox plant, under similar conditions, does fine. Any thoughts before I rip it out?
Name: one-eye-luke US.Vet.
Texas (Zone 8a)
Quitter's never Win
Hummingbirder Birds Organic Gardener Dog Lover Cat Lover
Jun 14, 2020 12:01 AM CST
Deadheading the spent blossoms will help keep the leaves in production longer as well as extend the flowering time. Post a photo so we can get a look at it.
NOT A EXPERT! Just a grow worm! I never met a plant I didn’t love.✌
Name: Lynda Horn
Arkansas (Zone 7b)
Eat more tomatoes!
Lover of wildlife (Raccoon badge) Container Gardener Lilies Cat Lover Lover of wildlife (Black bear badge) Zinnias
Organic Gardener Heirlooms Bee Lover Hummingbirder Echinacea Tomato Heads
Jun 14, 2020 1:02 AM CST
I have this problem with my garden phlox. I agree it's not a disease, I think that some varieties just do it more than others. I live with mine this way. I remove the spent leaves. I tolerate this because of its long bloom time and it's draw for butterflies. Thumbs up
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