purple discoloring on agastache leaves

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CatMint20906 Silver Spring, MD(Zone 7a) Jun 06, 2015

I am wondering what would cause this purplish discoloring? The plant is also not leafing out as robustly as it has in the past. Is there a nutritional deficiency of some kind?
thanks

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Diana_K Contra Costa County, CA(Zone 9b) Jun 07, 2015

Could be. Easy to check: Work a little fertilizer into the soil around the plant, and spray some foliar feed onto the leaves. Fertilizer for foliar feeding is any water soluble fertilizer diluted to 1/4 or weaker.
You could use an organic material like Fish emulsion or a chemical formula like Miracle Gro.
Be sure to spray the undersides of the leaves, this is where the plants have the most stoma where they can take in the fertilizer.

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CatMint20906 Silver Spring, MD(Zone 7a) Jun 08, 2015

thanks, Diana!

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