anita wrote:

Hello everyone

I have a question, I am TRYING to grow seeds in cold frame, the plants
are growing ok but some kind of moss is growing in all the trays also,
am i over watering or something, i am new to gardening to it is all
learn as i go, also can i buy mulch at garden centres.


Welcome to URG..
While you're here take a looka the the FAQ's he
http://www.tmac.clara.co.uk/urgring/urgfaqs.htm

and look out for the ABC thats posted here regularly.

In answer to your Q's

1) ignore the moss, is possibly a little damp and cool at this time of
year and this may account for it, but unless it threatens to overwhelm
your seedlings it isn't a problem.

2) Most garden centres will sell bagged mulch of several kinds, eg bark,
gravel, manmade 'soil membranes' etc... If you have a large area to
cover however it MAY be cheaper to get it delivered by the bulk sack or
trailer load.

//
Jim