Yellow leaves on young Tomato plant.

[Scoot]

Any idea what the problem could be?






As you can see in the first picture it is creeping up the plant. It's only this one (my biggest one) for now.

It's on my window cill upstairs which gets about 6 hours a day direct sunlight in the evening.

It is not pot bound as I have checked.

[skeggijon]

Still looks like it could do with repotting

[Jungle Jane]

Nitrogen deficiency,have you ever fed them? Mine used to do this....Potting on would help,because of nutrients in the fresh compost or plant food?

[NatalieCooke]

Same thing happened to mine. I've since potted them into bigger pots.

[Scoot]

Same thing happened to mine. I've since potted them into bigger pots.

And are they any better now?

[Scoot]

Well I have took your advice everyone. They are repotted and have just been fed with some general feed (made it slightly stronger to try and pick them up).

[Scoot]

Will see how they get on.

[NatalieCooke]

And are they any better now?

I only repotted them on Monday but I'll take you a photo in a couple of days.

[Potstubsdustbins]

They also look as if the compost is very wet, be careful not to rot the roots on a young plant

[rustylady]

Well I have took your advice everyone. They are repotted and have just been fed with some general feed (made it slightly stronger to try and pick them up).

Never alter the recommended strength of feed - you're likely to do more harm than good.

[Scoot]

Never alter the recommended strength of feed - you're likely to do more harm than good.

I've done it before with this feed and it's been ok in the past. Fingers crossed anyway.

[bitShifter_]

Hmm tomatoes must be hungry beasts. Is giving them a bit if Nitrogen a good strategy in general? Thanks for this thread as I'm having the same issue

[Jungle Jane]

If the plants been in the same pot of compost for 6 weeks,I'l start feeding them. Some composts have a certain amount of nutrients that last about a month,nitrogen is quickly used up. If a plant had too much nitrogen it would have dark green leaves,but I've never experienced that to know how bad an effect it would have etc.
Also If the plant has trusses of flowers & is starting to fruit,swap from high nitrogen feed to a high potassium feed,for fruit growth,instead of leaf growth....

[jacob]

I wouldn't worry too much about lower leaves on tomatoes looking ropey. That said, I might just take a peek under the leaves looking for aphids.