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I have grown glads off and on, but last year I decided to try leaving them in the ground, and put some straw on top of them, and surprise, they all came back.
I would like any advice anyone can give on overwintered glads. Will they be as full and pretty as the original ones? What should I do to fertilize them? I've always put some bulbs fertilizer in the planting hole, but of course I can't do that now.
I am a commercial siberian iris grower, and spray yearly for thrips, so I will spray the glads along with the irises. Anything else I should do to protect them from insects or disease?
What are my prospects for the future? How long can I leave them in the ground before they go downhill?
We are on sandy soil and due to unusual conditions from Lake Ontario, the ground does not freeze here below and inch or two.
Any help will be appreciated. Thank you!
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