Use of super phosphate for irises...

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sempervi St Joseph, IL(Zone 5b) Mar 13, 2007

I can't remember which thread I read about the use of super phosphate for isises. When would be the best time to apply it?

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laurief Deer River, MN(Zone 3b) Mar 13, 2007

6 weeks before bloom

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Margiempv Oro Valley, AZ(Zone 9a) Mar 13, 2007

Some years I'll put it on twice. Once or twice in early spring before bloom, and once in the fall - as I anticipate rebloom here.

~Margie

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sempervi St Joseph, IL(Zone 5b) Mar 13, 2007

Thank you ladies. Have a great day.

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