yellowing leaves

[menk]

Problem: leaves are yellowing/dying

Medium/grow method: soil (Happy frog with added perlite).

Feed: and supplements used: Tiger bloom, Calmag, Microblast, Recharge.

water source: Tap water (left out to dissipate chlorine).
Strain/age: Mephisto Sour Crack - (approx 1.5 - 2 mos old)

light used: Platinum led 300 (approx. 20 inches above plant)

Climate: RH 35-40. Temp 78-90

Additional info: Water PH'd to 6.5+- after adding nutes. Soil PH is at 6.7

Plant was doing great up to about a week or so ago. Then noticed the leaves were going from deep green to pale green and then to yellow. I've been going light on the feeding as that's what usually gets me into trouble. I've been giving it 1/4 tsp tiger bloom and 1/2 tsp calmag every other watering, (I've been adding Recharge (1/2 tsp per gallon) to the "non-feeding" waterings.
The only thing that I can think of is that:
1. I'm underfeeding it.
2. The temp is getting too high at certain times.
3. A combination of 1 and 2.

 

[swazeyswag]

Part of my last grow did this. It was a Ripley's OG and a couple random auto white widows. I tried everything I could think of, flushing, extra nutes, less nutes, chanting a spell. Nothing helped with the yellowing, so I decided to check my trichomes and they were ripe and milky so I harvested. Have you checked your trichs?

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[menk]

Hey @swazeyswag thanks for the input. I haven't checked the trics yet, but she still has about a month or so to go before harvest. I'm still thinking nute deficiency, but which one I'm not really sure.

 

[Jackson]

Hey guys. I’ve grown this strain several times and it’s a fast one. Got one going now that’s only 47 days from sprout and almost ready

 

[menk]

Hey @Jackson, you and @swazeyswag might be right, Its definitely alot quicker than i was expecting. I might give it one more shot of nutes and see what happens.

 

[Waira]

underfed no doubt! A lot of demand in this last stage for P, K, Ca, S, micronutes,.. up your feed to a full dose for a round or two and see how she reacts,... too hot and low RH% are contributing factors to nutrition issues as well, so get them in better range or nothing you feed is going to really help,.. hot and dry makes the transpiration "machine" grind to a near halt, and so follows the nutrient flow,....

 

[menk]

Hey @Waira thanks for the feedback/info...I gave a full shot of nutes and it did seem to put the yellowing somewhat in check. It's been a real struggle trying to keep the temp and RH at a decent level but its doing better, having a heat source and a cooling system running at the same time seems a bit insane (unless you own the utility co. ).