I use a large home made propagator a lot. It has a rodstat, plenty of height and growing lights. I have a small well insulated greenhouse that I heat from mid-February and a larger unheated greenhouse (cgh) where I have one border with a cloche over it.
I start the propagator at the beginning of February with Aubergines, Tomatoes, Cabbage Primo, Cauliflower Snowball, Basil, Parsley and Lettuce. About a week later in go the Sweet Peas and I start taking cuttings of Chrysants and Surfinias (buy a few plants as soon as they appear in garden centre and 8 can become 80 by planting out time). Middle of the month I start pricking out things into the heated greenhouse (hgh). I sow Onions and Shallots in the hgh but give the trays a few days in turn in the propagator that seems to kick them off. Aubergines and Tomatoes are potted up but stay in the propagator, the lights make this possible. End of the month is the first Cucumber and Courgette, more Tomatoes and the Peppers (they will stay in there as potted up plants as well).
Beginning of March sow salads under cloche in cgh and plant out some of the early raised lettuce there. Dahlia cuttings start going in the propagator (possibly a bit early). A few Cobra beans in propagator that will be potted up in tubs, spend some time in hgh then move to cgh. Later in the month the early raised Cabbage and Cauliflower go into the cgh cloche. First flowers sown in propagator – Bidens, Rudbeckia, Nicotiana. More Tomatoes at the end of the month – I raise a few plants at different times so I can get some away early in the hgh, some later in the cgh and some later still outside.
Not a lot is sown in propagator during April, mainly used for growing on Aubergines, Peppers and Tomatoes and taking more cuttings. There are a few – Tomatillos and a few more flowers.
Beginning of May most of these plants are cleared out and it is given over to Courgettes, Pumpkins, Squashes and Gourds. I don’t use it for Sweet Corn, they go in the hgh first week in May.