ok im puzzled

5 week into flower (out of 9), plant loosing fan leaves, young leaves and the one surrounding tops are starting to get affected too. Though its a heat stress (30+ C) but problem persist week after fixing it. I do add epsom salt to every watering and give nutes (4-2-6 tomato fertilizer) on every third. Watering every 3 days now.
Leaves curl up, become yellow starting from tips, tips die, leaf turns completely yellow while veins stay green till almost end. I would guess Mg deficiency but it gets enough of it, unless something is locking it. Ph is 7. Planted in 50/50 compost vermiculite, under 250W red cfl.

Please help im worried that plant will wither before finishing / produce poor quality
 

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TheLastWood

Well-Known Member
Id say manganeese deficiency. To much mag locks out mn and ph of 7 also locks out mn. Mn def. Looks a lot like mag def. Almost identical. Are there any brown spots? Cut back on the mag, flush, apply some ferts or foliar feed with something with manganeese.

Could also be nute burn but I'm guessing mn def.
 
No brown spots, when it was young i had some necrosis between veins but epsom salt has taken care of it as on attached picture. I doubt its nute burn, there is no burn on sides of leaf, leaf turn yellow slowly in about a week with little drying at leaf tips.
 

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