I can only really buy seeds and the paraphernalia required in the same places as you. This week I bought [in woodies: i emailed them this post] mustard, pumpkin, carrott, sprouts, cabbage, brocoli, onion and sweetcorn.
I didn’t buy lettuce seeds because the man said: ‘did you see them there?’ ‘no, I couldn’t find any’ I said. ‘well then they must not be there?’ I said ‘I suppose you’re right…. thanks for being so helpful…’ and then he continued talking to his mate behind the counter. So I asked the girl on the cash register but I forgot [and she reminded me!] that ‘no I don’t do customer services…’
Anyhow; Fill the trays with compost. Pop two odd seeds into each plug cell. Don’t forget to label them! Drop into a sink and allow the water to be drawn up from the bottom. And wait for nature to take its course.
In the meantime we may as well dream……