mg or nitrogen def?

[baldyhippy]

Any advice folks on this one,they are 23 days into flower ive gave them epsom salts at week two of 12/12 still got the yellowing on lower fans tho,or could it be they need a nitrogen boast?

Not the best of pics,youll get the idea tho.

baldyhippy Reviewed by baldyhippy on 06-25-2007. mg or nitrogen def? Any advice folks on this one,they are 23 days into flower ive gave them epsom salts at week two of 12/12 still got the yellowing on lower fans tho,or could it be they need a nitrogen boast? Not the best of pics,youll get the idea tho. Rating: 5

[stinkyattic]

That pic is too blurry to see if there are any symptoms of Mg def, whcih would be striping interveinally. It's pretty obvious when you know what to look for.
I see N def and a bit of fert burn too.
Be very careful using N in flower! Go REALLY easy and use much less than you think you need.
Another thing that I can't rEALLY tell becuase it's so blurry, but I think I see some edges curling up, saying that the temps are too high.
Hint: Very high temps can cause chlorophyll to break down and make it look like you are N deficient, when it's a heat problem.

[baldyhippy]

Cheers for that Stinky,I,ll try get a better pic on tonight mate,my temps lights on are 80f and 70off sure the leaf curl is due to low humidity at lights on where it barley goes above 25rh,ive only given them 2ml grow and 2ml bloom per plant in a litre of water,so what ya rekon should i just give them a nitrogen boast next feed by upping my grow nutes to 3ml per litre per plant and add with my 2mil bloom nutes as usual,or feed them grow nutes only and give them a n only feed? thx for your help.

Bh.

[baldyhippy]

Me again! :hippy:

Heres a couple more pics of the bottom half of my plants hope theses are better for a diagnose?

Thx for the help so far people.

Bh

[the image reaper]

it's natural for the lower fan leaves to yellow as the plant ages, especially when it is flowering ... the plant is throwing it's vigor towards flower and/or seed propagation, not vegging ... I wouldn't worry too much about it, unless it greatly worsens ... your plants look pretty healthy, (you might have buried those rockwool cubes a little better) ... :smokin:

[stinkyattic]

Actually those plants DO look perfectly fine, if a touch yellow down low.
Putting rockwool in dirt, I personally prefer to leave most of the cube sticking up so it can dry out completely and prevent rot at the base of the stem.
If you already gave them a grow fert, you should be fine especially since it was at a low dosage. Just keep on with the bloom ferts and make sure the yellow doesn't get much worse until about a week or 2 before the harvest date. After that, all bets are off and yellowing is not anything to fret over.

[baldyhippy]

Cheers lads for your input,youve kinda put my mind at rest,if this was happining 2 weeks before harvest Stinky I would be happy but ive got 6 weeks left lol

From what info i can gather today,Ithink ill up my grow nutes as im now sure its lack of nitrogen maybe not alot but there is something missing,the nutes i use are the biobizz range grow and bloom and both need to be used together when in flower,so tomorrow when i water ill add an extra 1ml grow so that ill take me too 3ml grow and 2ml bloom per litre of water per plant....cheers folks for your time and patience.

Bh.