Looking for input on what the problem is

[1toke]

These are photoperiod outdoors in the ground not in buckets. They are 7 foot tall but have a problem of some kind.

[dirtymike]

Probably a PH issue at the roots. Calcium, magnesium, zinc not up taking properly. Run proper PHed water only for a few days, rain or well water is best for it. More nutes means more issues. Soil has all it needs.

[Wayzee]

What have you fed them?

[1toke]

Just water

[Wayzee]

If your pH is ok I'd be giving some cal mag and id say at 7 ft and halfway into flower they are looking for some extra PK, it's normal to start getting the odd yellow leaf at this stage but not in the way yours are doing it..

[1toke]

Wayzee....I have well water and never had a problem like this before. I do have some Bud Explosion PK I have used on autos. I will give that a try. I forgot to mention we have had some hotter than normal weather this Summer too. Maybe that is part of the problem. Just hoping they make it too harvest.

[Wayzee]

Mmm the heat shouldn't affect them to much seeing as the roots are in the ground not a pot and should stay relatively cooler as long as they get a good soaking before the hot weather. Give her some PK start at half the recommended dose and alternate each watering between feeding and straight watering if it doesn't get worse up the dosage To full strength. The beauty of growing in the dirt ive found is it harder to overfeed and near impossible overwater if you got good drainage.
You must have good bore water over there, I wouldn't wash my car with our bore water.

[Rwise]

Check the PH of your soil, and the water/feed solution. IF the soil is low add dolomite, IF the PH is high add pelleted sulfur for PH buffers. Read this;

https://www.growweedeasy.com/cannabis-plant-problems/magnesium-deficiency

[dirtymike]

A slurry test would be an excellent choice for in ground. Most of your grows are in ground.

[1toke]

Thanks Wayzee dirtymike Rwise for the input. 👍