Cool June weather caused variances of blue/purplish nutrient deficiencies in my container garden that are nearly only attributable to temperature. The root zone gets cold, the plant cannot uptake nutrients properly, nitrogen gets processed but a lot of other things don't.
The deficiencies were most notable in smallest containers, the least insulating. A 3gal and 5gal experiment were stopped in their tracks, and the 7gal containers had a touch of it, and the 10's and 15's were unaffected.
Just an idea, but your weather is somewhat like my weather.
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