I start my first seeds about mid February. I start onions and some of my flowers including some perennial flowers. I also gamble on an early crop of broccoli, cabbage and lettuce – always hopeful that we’ll have an early spring
For the onions, I start them in small pots or flats (recycled yogurt cups here). I plant the seeds in moist seed starting mix and cover the container with Press-n-seal (I like that I can re-use it) until the seeds germinate. Once they are up, I take off the cover and put them under grow lights or into the greenhouse window to grow on. Its important to use a sterile seed starting mix to avoid damping off disease.
If the onion little plants get a bit ungainly and start to tangle up, I just trim their tops. They will be ready to go in the vegetable garden end of March (weather permitting). I just break apart the clump and plant them individually. They go in as kind of wimpy little threads that you don’t think can survive. But they do. They’re tougher than they look!
Some flower seeds need a pretty long period of growth indoors (some 10 weeks). The more cold hardy ones (like snapdragons) can actually be planted out before the last frost date provided you harden them off first. So for some flowers its not so crazy to start them in February. Pay attention to the seed packet instructions though. Starting seeds too early can result in weak spindly seedlings by planting time. Bigger is not always better.
I start these kinds of flower seeds the much same way as the onions, but pay attention to the growing instructions because some flower seeds need light to germinate and should not be covered with the starter mix. I also give the flower seeds some bottom heat with a seed starting heat pad to help them germinate.
Once they get a few true leaves I’ll transplant them into flats to grow on before going outside in April or May.
I resisted this for a long time. It seemed like so much more work to do the transplanting instead of just starting the seeds right in the cells of the flats. But it actually works so much better for me, especially for extremely small seeds or ones the germinate erratically. I waste less seed and I can transplant the strongest seedlings – so I end up with a strong plant in every cell of the flat.
I start cabbage, broccoli and lettuce in mid February too. It’s a bit early, but I want to be ready in case of an early spring. These I seed directly into a self-watering flat with 2-3 seeds in each cell. If more than one germinates, I’ll cut off the weaker ones and let the strongest seedling grow on.
After growing for a month and a half they will (hopefully) go into the garden in March.