Quick question about yellow leaves

if one of my leaves on my plant is quite yellow what does this mean? too much or too little water? or is it to do with light or nutes? can somebody let me know thanks for help

Pics and a little more info would help. How old, feeding and watering cycle, etc...

Lets see that bad girl and give us more info.

sorry guys i cant give you no pics yet my camera is not here ill explain as much as i can, the strain is blue cheese, they are now 3 weeks and 3 days old but quite big and chunky for there age i think, i am not feeding them any nutes as of now, i was feeding them Bio-bizz root juice for the first 3 weeks from sprouting but now i am feeding just water untill friday when i put them into flowering. i water them once a day when they need it. the rest of the plant is fine really nice dark green colour no droopyness just that one leaf which is on the first node. hope this gives u a bit of a mental picture thanks guysss

have a look at the roots mate it may be root bound.all i can think of from what u describe using my "mental picture".i bet its time to transplant
P.S let me know if it is or not cos if not we can start to look into other things

You gave nutes too early maybe, like whoever said root bound or nute def. cause during flowering you need n I believe and since you gave nutes at some point that could be the cause

He hasn't gave em nutes yet and its absolutely normal for the cotyledon and first leaves to yellow and fall off.If the whole plant was yellow i'd say feed em but since they not u should be good. Hope this helps

At three to four weeks from seed you should start seeing the bottom leaves turning yellow. This means the plant is using up it's available nitrogen and to a tiny extent, potassium and phosphorus. Nitrogen is always the first to be used up and it shows as an even yellowing of the leaves. Sometimes starting at the very tips, but quickly it becomes the entire leaf.

I've always used this sign as the plant telling me, okay go ahead and start feeding me now (or transplant into a larger container).

HotShot7414 said:

He hasn't gave em nutes yet and its absolutely normal for the cotyledon and first leaves to yellow and fall off.If the whole plant was yellow i'd say feed em but since they not u should be good. Hope this helps

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yeah i havnt fed them nutes yet just the bio-bizz root juice which is organic to get the best roots! thanks for the help

Vindicated said:

At three to four weeks from seed you should start seeing the bottom leaves turning yellow. This means the plant is using up it's available nitrogen and to a tiny extent, potassium and phosphorus. Nitrogen is always the first to be used up and it shows as an even yellowing of the leaves. Sometimes starting at the very tips, but quickly it becomes the entire leaf.

I've always used this sign as the plant telling me, okay go ahead and start feeding me now (or transplant into a larger container).

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This helps quite a bit, it was my pal who told me about needing to transplant, to be honest my pots at the minute are very small, like a bit smaller than a coke can i am ashammed to admit lol. i am going to transplant them today into a 5litre i think, thanks for the help though it has really helped!