Phil L wrote:
I've got some seeds started off and want to know how to retain moisture? - I
do have a few of those propogator lids (clear perspex, about 6 inches tall)
and they work fine, but I want something to cover the rest....I've tried
clingfilm etc but once the seedlings are an inch tall they hit the top, the
seed trays are on window sills near radiators and tend to dry out very
quickly.
Is there any way I can avoid spending any money?

I know you don't want to spend money, but the last 3/4 years I've
started to use vermiculite mixed with my compost for sowing my seeds.
I've found the moisture stays so much more longer and the plants really
benefits from it.

Also like you I use any clear bags I have, but I prop the bag up by
planting at each corners of my pots/trays 15cm sticks to keep the bag
up so that the seedlings don't knock their heads on the bag. Last
night, I've sown my hollyhocks (I know it's early but I it works for
me) and covered them with a brioche plastic bag )