"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
?
Mine did the same last year.
It was magnesium deficiency.
After using some tomato feed they picked up quickly.

Check the bottle carefully.
We found that some of the discount shed own-brand stuff didn't contain
magnesium, whereas the branded stuff like Tomorite did.
After careful ingredient label checking we started useing Homebase and it
seemed fine.