cineman wrote:
Hi,
I have grown tomatoes in double grow bags for many years with
ewxcellent results.
place one grow bag on top of another cut a cross in top grow bag as
you would normnally, sccop away compost, then cut bthrough to bottom
grow a hole about 4 to 6 inches diameter, place bone meal in bottom
and stir well.
now ensure even coverage of compost and plant toms, etc.
using 2 grow bags gives more space for roots.
As to watering, pierce bottom bag to take a length of 32mm waste
pipe with elbow one end which sticks out, block other end, pierce, or
drill several sma ll holes along pipe, and insert long ways, water
into elbow until full. Depending on size of holes this could keep
bags well watered for quite some time.
Hope this helps.
[...]

While the more simple-minded among us just tip the growbag stuff into
pierced buckets or something, and get just as many tomatoes for half the
price and a fraction of the effort!

--
Mike.