Possible iron deficiency

I have about 8 plants that over the past 2 weeks have turned yellow with brown spots, I went Bout 3 weeks with no pH meter, in a 40 peat, 30 compost, 10 worm castings, 10 aeration, and 10 parts amendments ( kelp, tree tone,(4-3-2), fed with compost tea once a week. My water was at pH of 7.5 (straight tap from well) for those few weeks and this happened to about 8 plants around a week ago, these are mothers that are on there 3rd round of limb donations. Runoff was checked on all plants with problems and they all had a consistent runoff of 6.5 in 7.5 out, so an iron lockout seems reasonable but I always appreciate a second opinion.

at a glance it doesn't look like iron or at least not iron alone

its also hard to know how hot your soil is or is not based on what we know
so itll be hard to be sure but im willing to take some guesses and possibly be wrong

I can tell from the picture but tell me

are your leaves cupping on the long edges/margins almost like a taco or canoe?

im4satori said:

at a glance it doesn't look like iron or at least not iron alone

its also hard to know how hot your soil is or is not based on what we know
so itll be hard to be sure but im willing to take some guesses and possibly be wrong

I can tell from the picture but tell me

are your leaves cupping on the long edges/margins almost like a taco or canoe?

Click to expand...

On a few, but it wasn't consistent, and the cupping seemed to be more on healthier leaves which I think may be from cold temps. And no, I think it's a pH problem causing a couple different nutrient deficiencies, the mix has a farely balanced micro mix, so I don't feel it was lack of presence, just availability?

What are you feeding and how much? This is important.

Looks like several things together...

Might start pHing all in-going to 6.5

Ya, that's what I just started doing again, got the pH meter BAK working and calibrated about 3 days ago.

id say you have to assume your issue is the ph swing you experienced

after your had a week or so of waterings at the proper ph re-evaluate