FUBARed and then some

[thelawless1]

Urgently looking for help. My garden is in complete meltdown. I have plants ranging from 4 to 8 weeks. Grown from seed there providence is a complete mystery. All started strongly yet began to deteriorate at the 3 week stage. They were planted in Sealy's Premium (Aust. soil mix) with 20/1 mix of manure mix and perlite. Initial seedlings under 400 watt LED, learnt and remaining seedlings kept under a 4x36 watt T8 fluoro array. This is where it goes to shit.

 

PH 6.2 – 7.0 (non digital measurement)

Temp 24 – 28 Celsius

Nutrients – Canna Terra

Room is ventilated.

Lights on 18/6

 

(1) Growth has been slow and has almost stopped in places

(2) Plants display numerous symptoms of nutrient deficiency that correspond with a range of problems. At first I thought nitrogen, then potassium then it looked like zinc. (Buggered if I know)

(3) Tips of leaves are severely burnt on nearly all plants (see pictures) and this can and does happen in under 24hrs.

(4) 2 weeks ago, on the chance it was medium lockout, repotted 2/3s into peat moss.

(5) Fertilizer is Canna Terra applied firstly at 1/3 strength, then ½ and finally full strength.\

(6) Lights are 1000w LED. Four (4) in 3.5m x 3.5m room. Currently at 1 meter above canopy ( ).

 

I have no problem saying I am completely fubared. Nothing I have done has helped and I am at a loss. Help please.

[haze420mist]

Hey mate

 

If new growth is small and distorted may need a dose of calcium, if plants leaves are browning from outside in may mean magnesium is lacking look up and DYOR. I have never grown in this medium so can't be to sure. Good luck

 

Haze

[haze420mist]

 

 

Hope this helps

 

Haze.

[iTiC]

That looks like a calcium problem, perhaps the pH needs to be ajusted

[buzzo]

Potting mix is all they should need at that stage of development.

I'd say you've Nuke em.

Time to flush with PHed water

[pegz]

Too much fert.