Sativa plant issues. Pictures included.

Hey RIU. I posted another thread about some issues i'm having with one of my Sativas but didn't get much help so i'm posting again.

Strain: Wild Thailand
Age: Flower Week 5
Feeding: Full line of Fox Farm nutrients at 1/2 strength + 1 tbs Molasses once a week with one plain watering between feedings
Problem: Yellowing on new and old growth, spotting, clawing (clawing showed up after flushing when the soil was still wet)
What i've done: 5ml of cal-mag, flush, 3ml of nitrogen, 1/4 tsp of Superthrive, Current PH of runoff: 6.5

I've spent so much time trying to figure out what is wrong with this plant and I fear if I don't solve the issue soon, she'll die. Plus a heavy decrease in yield. This is my first grow. Please help!

Another Fox Farm feeding schedule success story! Seriously, their directions are not geared toward MJ, proably tomatoes. If you use their schedule again, go with half the amounts listed and you'll stand a better chance.

Unfortunately this is at half strength. I'm at such a loss as to how to help this plant.

Sorry, my bad. I'm a little biased against that feeding schedule so I guess I didn't see that you said 1/2 strength.

I edited my info after I realized I forgot to put 1/2 strength so no worries! Is it possible this could be a potassium deficiency? With the yellowing from the outside in, the curling of the leaves, brittle stems/leaves..

Oh! Thanks, I thought I was losing it a little.

You'll probably need to give some more information like your base soil mix, and if you know the ppm of the 1/2 strength Fox Farms, that would be good to know. Your severe leaf curl and burned stems don't look like under-feeding to me, more like over-feeding that has possibly caused a lock out. Your water supply is also worth understanding better, ppm of source water if you have it.

I really need to invest in a ppm meter. Any suggestions on some quality brands? The base soil is 1/2 light warrior 1/2 FFOF with 30% added perlite.

With full FFOF and following their feeding schedule at 100%, I would have been comfortable thinking you had a clear case of too much nutes. With what you've described, I can't say. Off to the peanut gallery for me. Good luck!

Salt build up. When excess salts build up in a pot the plant can't take up N and other nutes. It has spent its whole life in that little pot which encourages salt build up thru moisture stress. Re-pot it then use full str nutes. Get temps under 80.

Even at half strength, most pure sativa strains aren't very heavy eaters.

Hi StayLifted,
Like PlagueDog said...sats are nute sensitive. I'd reduce it to 1/4 nutes and cut out the extras like superthrive. Keep it as simple as possible. Then, depending on how plant reacts, increase nutes slowly according to plants needs.

You've chosen a very difficult and low yielding plant for your first grow. A Thai's are late finishing and very herm prone.

Repotting may be a good idea but definitely not full nutes...you'll kill it for sure.
Good luck,
JD

That poor thing is SCREAMING at you to transplant it into a bigger pot. With some fresh soil and some extra leg room, I promise you your plant will start to perk up in a hurry. Give it water only for a week or so after transplanting.

I agree with what others said. Re pot. Feed really lite for a week or more. I've has this issue with some strains. And it wasn't the strain. It was me. My nute ratio was off a bit. Caused buildup of salt. Once I corrected nutes. She recovered within 2 weeks to full health. I'll take a pic when I can. I doubt your leaves will recover. They'll be droopy for remainder of its life. Only new growth will tell you if she's responding to what your doing. So repot and feed lite and be patient.