In article , Gerry
writes
I am in the process of ordering a 36' by 14' polytunnel to get my seedlings
going earlier in the year as we get a lot of rain (and cold) here in the
normal growing season (gotten worse over the years).
Intend to use it to get seedlings growing instead of buying plants (eg
Tomato)
and to get cuttings rooting and growing for the first year and especially to
grow early potatoes and vegetables.

I am looking for a group that might be appropriate or advice on layout. I am
considering digging two trenches down the length of the tunnel to minimise
bending and to get better use of the edges of the tunnel as it slopes to the
ground.

Ours, which is considerably smaller than yours at 20' by 10', has beds
along each side raised about 9" and supported by 1.5" thick timbers,
giving better drainage and reduced bending. The central path is 16",
just wide enough for our wheelbarrow. The raised beds were filled with a
mixture of compost and soil from levelling the site. The beds don't
extend quite the full length of the tunnel - there is a space of c.2'6"
at one end where I have put shelves for seed trays and to accommodate
the usual gardening clutter.

--
Malcolm Ogilvie