Afghan kush, Yellow/brownish leaf issue (Pic inside)

Need some help diagnosing this plants issue, The ends of the leafs are yellowish and they seem to be getting worse (pic/info below)
10 days since sprout under t5 h0 6x39 (18hours on 6 off)
soil at the moment = organic peatmoss premium potting mix, slow release fert base, richgrow complete trace elements the plant was started in this soil, Have not transplanted yet
Average temp seems to be 26-27 degrees c with the lights on 20-23c with them off
Max temp that its seen so far = 32c for around 2 hours afew days ago

Had the same issue with 2 other plants except the others had no added nutes just peatmoss/potting mix, They ended up dying after they were transplanted (The leaves begun like this plant but got much worse fast).
Any info regarding what the cause is/what to do to get it sorted out asap would be great thanks in advance.

Pics didnt show up. Hard to say what issue is. What do you mean by "premium potting mix"? Probably to many nutes for seedlings. Hard to say. Thats alot of light too.

first off you got bugs i would buy some neem oil and start treating them
and plant needs food more food i grew afganistan for a while they like lots of food

DrFever said:

first off you got bugs i would buy some neem oil and start treating them
and plant needs food more food i grew afganistan for a while they like lots of food

Click to expand...

Hrmm i have seen afew tiny bugs, Will look into sorting that issue out, I thought the prob was too much food more pics below its getting worse

Ya that soil looks pretty gnarly too. They look hungry for sure. Get em in to some new soil just not miracle grow IMO. You should probably pot up in order to get better soil for them to grow in, but I wouldnt pot up to much. It makes it hard to tell when to water the bigger the pot. Use something like Fox Farm or I use Roots Organic and have great results.


Are you feeding them something right now, or what soil is that youre using?

We fed them a 10 4 6 N P K multi nutrient plant food (yates) - with seaweed. ALso "contains manure, blood and bone, fish emulsion and seaweed".

It's a liquid fertilizer and we diluted 5ml in 1litre of water. We watered the plant with approximately 200ml of that solution.

Should we feed the plant some trace elements (Richgro complete trace elements, iron sulphate, blueing tonic, magnesium sulphate, copper sulphate, zinc etc...) or are they being over fertilized?

This is our first grow and kind of baffled.

Thanks for the replies so far.

P.S Would the current temps be causing a heat problem?

[edit] had to fix some spelling errors - too high.

Added some Richgro last night, Put the problem down to magnesium deficiency. Looks like it's getting better but still not sure.