Icky, sickly zinnias

mrs_emily(8 Louisiana)August 3, 2005

What on earth could be wrong with my zinnias? They ARE second-generation, grown from seeds I collected last year, but last year's were gorgeous, and this year the stems started to turn a sickly brown, the leaves look withered and the blooms die early. I don't see any bugs, but that doesn't mean much since my eyes aren't what they use to be. Any ideas?

Thank you for reporting this comment. Undo
tapla (mid-MI z5b-6a)

Powdery mildew and/or spider mites are first to come to mind as common on zinnia. But it could be something else - fungal, perhaps.


    Bookmark   August 3, 2005 at 7:03AM
Thank you for reporting this comment. Undo
meldy_nva(z6b VA)

I agree with Al, with emphasis on the mildew. If it is one of the mildews, you can try drenching the plants with a 'home-brew' of 1 tablespoon milk and 1 teaspoon baking soda mixed into 1 quart of water. Repeat after every rain. Sometimes it helps, sometimes not. Nothing will recover the portions which are dead, but the living plant/s might improve enough to provide you a show of blossoms in a couple weeks.

Another thought is whether or not the saved seed came from hybrid parents -- which do *not* pass the exact hybridized traits into their seeds but instead often revert to one of the grandparents genetics. "Strains", which are not quite hybrids, pass their general characteristics through the seeds - State Fair zinnia is considered to be one such strain. I mention this because I have found saved seed from State Fair does seem to have a great weakness for mildews (shouldn't, but it's happened several times) with the saved-seed-plants often being sickly, small flowered, and mildew-prone. I no longer bother saving that seed.

    Bookmark   August 3, 2005 at 7:43AM
Thank you for reporting this comment. Undo
rhizo_1 (North AL) zone 7

One of several fungal leaf spot diseases might also be the issue in your part of the country. Bacterial leaf spot could also be a problem. Heat and humidity help create the perfect conditions for the onset of these common zinnia problems. You should see some of mine!

I'm going to cull the offending plants today, and dispose of them. No more zinnias can be planted in those locations (or other disease prone plants). I will never purchase that variety again, either.

I'm going to devote plenty of annual space next year for more of the Profusion zinnias, and of course, Z. angustifolia. Though not the best for cutting, they are tireless bloomers, drought and heat tolerant, and practically disease proof!

If you are interested in a good commercial seed source, let me know.

    Bookmark   August 3, 2005 at 10:55AM
Thank you for reporting this comment. Undo
mrs_emily(8 Louisiana)

Sure, rhizo, I'm always interested in obtaining good seeds. As far as the plants that I currently have, I guess I'll pull some of the worst and spray the ret with the recipe Meldy provided. I hate not having my usual zinnias...they normally draw so many wonderful creatures to my yard...and this year it's been lonely out there compared to last :(

    Bookmark   August 3, 2005 at 3:11PM
Thank you for reporting this comment. Undo
maineman(z5a ME)


"...They ARE second-generation, grown from seeds I collected last year..."

Do you happen to recall the name of the seed parent?


    Bookmark   August 4, 2005 at 1:57AM
Sign Up to comment
More Discussions
gardening supplies for beginners
What basic supplies do I need for a vegetable garden? I...
Does anyone read gardening books anymore?
Am I the only one who likes to read gardening books...
Dust & Insects in Seeds. Still OK to be planted?
Hi, i have a pack of wheatgrass from about a week ago....
Sprayed roundup weed killer
Sprayed roundup weed killer on my lawn by accident....
Need help with white-spot in plants....
Hi, i'm new in gardening, and in need of help with...
© 2015 Houzz Inc. Houzz® The new way to design your home™