Help with spring onions

I sowed some in seed trays, general purpose compost with a little manure (rabbit) in the bottom, I sowed them an inch apart and they've grow great. I sowed them in the late autumn (plastic greenhouse over winter) and we've been eating them a few weeks.

Just stick them in and grow them, I don't even bother thinning them, that's it really but make sure you keep them watered

I'm having the same problem! They germinate slowly and then just stay tiny.

In my experience they never do grow rampantly - but they do grow in the end. You need to expect a much longer growing season than, say, radishes.

I sowed some in pinches in jiffy 7s in Feb and transplanted them into the lottie with 6 inches between each and they must now be about 8 inches tall.

If they are sitting there then something is missing. Try a dose of epsom salts, sprinkling coffee grounds around them, or you can get organic root veg and onion food and mix it with compost and sprinkle that in. If you are growing in clayey soil, loosen the soil around them to let them grow a bit [only the top 5mm, as the roots are very shallow].

If nothing above works. Try uprooting them and transplanting them. Sometimes this gives them a bit of a kick up and backside.

All onions take a while to grow, are you giving them enough time?

The best onion seedlings I have had were sown into peat free compost and are rocketing away now. I do grow alot of onions though, so perhaps am not sitting willing them to grow as I've got loads from last autumn that are being used now and by the time they are done, my autumn sown from seed onions will be ready, then the spring sown sets, then the spring sown seeds.....and so on.