Hello all..

Any idea what my problem might be?

Condidtions
-24hour light.
-Temps are about 20-21degC(looking forward to summer).
-Humidity 55-70%
-Airflow was limited but is now good(has been for 3 days).
-In a good quality(recommended) potting mix with 30% perlite.
-Watering when dry (every 4-6 days).
-have given rhizotonic twice(pure water last 2 waters)
-have given epson salts

My theorys(but i have no clue really)
-Nute burn from rhizotonic.
-Nute burn from potting mix.
-Due to lack of airflow.
-Low temps

What stage of growth are they at?

I ain't a mud grower mate but they look f'n starving to me, 30% perlite won't ave
helped either, thats almost hydro.

Get your profile filled in.

Starving you say? i thought they were signs of over nute.

they are 25 days from germination...almost 4 weeks old

my grow diary

Should I feed?

hi mate
when was the last time you repotted them ?

what lights you using ?

and what are you using for extraction ?

THanks for the reply mate.

Repotted 11 days ago.

Currently they are under 3x30watt 6400k fluros.

I am using 2x12cm computer fans for extraction..1 for in 1 for out. The box is only small about 30x30x50cm.

hi mate

what size final pots you going into or are they in final pots

check new growth for colour

if its pale green with i think it will be its time for some feed.

at what stage are you going to start flowering them ?
because they want to be in there final pots for about 2 weeks before flowering. (give roots time to grow in new pots root growth is slow to nil in flowering )

personally i would give them a feed even if you are going to repot and if your not repotting feed every time your watering from now on

what nutes are you going to be using ?

also i take it you will be moving them to another taller flowering what height do you have ?
because they will double/triple in height when they flower

im no expert far from it and im sure someone with more knowledge will be along soon but at least it gives you a start .
cheers and enjoy your grow
B.F.G.W

1.The pots are too big for the plant therefore the compost will stay wet for too long

2.You havent enough air exchange

3.By the looks there is to much perlite in the mix

Owd

Thanks for the advice B.F.G.W

Final pots will be 7L. Perhaps i should do 2 change ups im not sure..but yeah ill wait 2 weeks after i put them into their final pots before switching to flower.

I'll flower them when they are fully mature..at around 6-7 weeks.

My flower room is roughly 1.2m tall...but ill be scroging anyways to make the most of the lights im using.

I'm using bio canna nutes


The new growth is light in colour...I think i will give them a feed next water, just a light one maybe half strength see how it goes..


Thanks for dropping by Owd, brutal as usual but ill take it onboard.

So there is no obvious cause for the yellowing and brown spots on the leaves?

As Owd says those pots look to big m8,big healthy root system's what you need

Also have you any drainage holes in those pots,i ask cause they are not on trays

My guess is those horrible marks are from overwatering

It does help people if you fill in your profile dude

Thanks

The pots really arnt that big...i think its just the way they look in the photos

they do have drainage holes i have just been letting it run off into a tray.

Definatly not over watering..untill lately i have been waiting untill they are bone dry...almost a week. They seem alot happier now that i am watering more often.

I really got no idea what those horrible marks are..

Im starting today to give em light dosage of nutes....see how that goes.