In article , Stephen Howard
writes

They seem, so far, to be working quite well. The six toms I planted up
are growing away nicely.

Good!

FWIW we don't use growbags we grow our tomatoes either in the floor of
the greenhouse, or outside in a veggy bed. They seem to do a lot better
that way, but the usual precautions regarding crop rotation have to be
observed, especially if potatoes, peppers or aubergines are grown.
--
Alan & Joan Gould - North Lincs.