If you like lettuce now is a great time to sow some seeds. If you are going to plant seedlings through your weed barrier, (cardboard or similar) you will need to sow some seeds in a container like this one which I saved after a supermarket shop. You need to make some drainage hole with the tip of a sharp knife. If you are unable to buy some seeds see if a neighbour or a friend have some spare. All you need is literally a pinch.
The next thing is to add soil. I have used my trowel to scoop up enough from a corner of my garden which I have sifted to remove bits of twig and then rubbed through my hands to make it more friable.
One of my favourite lettuces is Little Gem. They are a tasty, fast-growing little cos type. Because garden soil can contain lots of weed seed sow the seeds very thinly as in the photo in rows so you can identify them when they germinate and not weed them out by accident!
Once you have sown the seeds sprinkle a little soil over them, gently firm and then, if you have a watering can with a rose, lightly water. Otherwise water carefully using a jug. You want the soil to be moist, not sodden. I like to add a label and date to remind me what I have sown.
Now you need to put the seed tray somewhere light and warm. A windowsill in the kitchen is ideal. If you have another clear plastic container the same size you can put it on top like a mini-cloche. Alternatively cover with some cling film. With luck, in a few days you will see the seedlings start to emerge.
After just seven days the first lettuce seedlings have started to emerge. Keep the seedlings moist and grow on outside out of direct sunlight if you are keeping the cover on, otherwise a sunny spot is fine. Watch out for slugs nibbling them. It is worth checking the seedlings when it is dark and removing any slugs. But, hopefully this will not be a problem. As you can see in the photo, the seedlings are roughly in three rows. If any weeds emerge they will now be easy to identify and remove.