My guess is the compost is too wet, because of the water cystals which have
been added.
"Mike" wrote in message
...
Hello,

Planted some "Tomato Tumbler" plug plants last week each one in a large
pot using stuff from a grow bag and some water crystals.

Noticed today that the young plants are going a bit yellow.

Is this too much sun, as they are out all day or nothing to cause concern
?

Thanks.

Mike