Yellowing of early true leaves?

[Baizanator]

Just potted up two Jetsetters and a Sungold for fall tomatoes. The newest true leaves are yellow. I thought it might be due to overwatering since they were on a wicking pad underneath but, after a few days of drying out, nothing has changed. Plants appear to be healthy otherwise with good growth and no wilting or apparent sickness. I've placed them in a window to day to begin hardening them off but would like to know if I should add a light fertilizer application to the plants.

Any help would be greatly appreciated.

[Baizanator]

Now with photos. THe only thing is that I was giving them 24-hour light. Could this be a factor in this? Going at 14 hours a day now.

[RayR]

Yellowing upper leaves is usually a sign of iron deficiency. I would say that if you haven't yet fertilized them, do it with a liquid fertilizer with some iron content.

[Baizanator]

Originally Posted by RayR

Yellowing upper leaves is usually a sign of iron deficiency. I would say that if you haven't yet fertilized them, do it with a liquid fertilizer with some iron content.

Did it yesterday with Miracle Gro Tomatoes

[zabby17]

Baizanator,

How close did the tops get to the lights? Your pic looks like what happens when mine get so tall they touch the light and I don't take care of it quickly enough. Usually they can take it for a day or so but too long up against even a fluorescent they get bleached-out looking like that.

I imagine if that was the case you would have said so, so maybe that's not it. But it really seems like something physical, as it's so VERY light yellow, and only at the tops, with even part of the same leaf looking very pale in one part and healthy green still in another.

As the rest is healthy-looking, I think you'll be fine.

Remember when you plant out to plant DEEP---some of that stem can become root and make a really sturdy plant.

Good luck,

Z

[Baizanator]

Originally Posted by zabby17

Baizanator,

How close did the tops get to the lights? Your pic looks like what happens when mine get so tall they touch the light and I don't take care of it quickly enough. Usually they can take it for a day or so but too long up against even a fluorescent they get bleached-out looking like that.

I imagine if that was the case you would have said so, so maybe that's not it. But it really seems like something physical, as it's so VERY light yellow, and only at the tops, with even part of the same leaf looking very pale in one part and healthy green still in another.

As the rest is healthy-looking, I think you'll be fine.

Remember when you plant out to plant DEEP---some of that stem can become root and make a really sturdy plant.

Good luck,

Z

Yeah, I was going to bury a good portion of the stem. As for how close they got, they did get a bit close but some were outgrowing the other plants and I didn't want to move the lamp too high. THis isn't my first time starting from seed, but it is my first time with a light as we usually do it in my grandmother's greenhouse. Obviously, being July, it's too hot for the greenhouse right now.