Ongoing issue. Any ideas?

Ok so this grow I changed a lot of things. I added a mini split. I tried new strains and tried different nutrients.

I've always had good luck but always battled the heat so I added the mini split....problem solved.

I always try new strains but usually I have a little experience with them....never grew these ones before.

I use advanced nutrient. Always had GREAT success with them. Only thing I changed on this end is I went from the ph perfect grow micro bloom to the ph perfect sensi grow and sensi bloom.

My veg was looking awesome. All the way through everything was super vigourus. They still are growing great and right on track for 14 days flowering.

My issue is that I had some brown spotting on some of the fan leaves on over half the plants when they were 1 week into flower along with some yellowing and red stems.

I thought it was cal mag deficiency and after some help from you guys I added cal mag to the watering schedule along with foliar fed 2 times. They seemed to improve greatly but there are a few that are still having issues. If it is a cal mag deficiency should I see 100% recovery in a week? Is 2 foliar sprays enough?

I'm in pro mix and feed every water 50% recommended nute dosage at a ph around 6.0. Day temps are around 74° and night temps are 68°. My humidity is steady mid to high 40s. The main strain is a Gorilla Glue cross.

Any ideas are greatly appreciated.

You'll be looking at new growth for improvement. The leaves that have already been affected won't repair - they'll just stay that way. And that's ok. As long as it's not affecting other leaves or new growth then you're in good shape.

FennarioMike said:

You'll be looking at new growth for improvement. The leaves that have already been affected won't repair - they'll just stay that way. And that's ok. As long as it's not affecting other leaves or new growth then you're in good shape.

Click to expand...

Should red stems fade back or stay red?

Jeffro420 said:

Should red stems fade back or stay red?

Click to expand...

They'll stay red. Red petioles, leaf stems, alone doesn't always mean a ca/mg deficiency. A lot of strains just do that. Red on the main stem or leaf veins definitely means a deficiency. But I'm thinking that you're plants are doing well.

Your underfeeding them.

The red stems are telling you your low on P.
They look a tad light in the pics - hard to tell with that lighting...But, your description and your feed info says "underfeeding'.....
Are we worried about over using P and getting early yellowing?

Simply use the veg line till the second week of bloom is over. THEN go to 50:50 bloom and veg mixed and at week 4 go full strength bloom....If that strain still shows P problems, (too much-reduce strength of mix) next run do the same except for use a 3/4 strength mix......same time to change as above.