Sowing in January, should I?

in Plants
Hello! I am new to the forum and to the gardening world.
I've wanted to start growing veggies for a while now so I have been doing a lot of research, reading different sources and watching videos to start cultivating this year.
I know January is quite a tricky month though, I live in a hardiness zone 6b. Is it possible to sow something indoors or outdoors at this time?
I have read many different sites. Some say it is possible to sow onions and celery others lettuce and chilies, but then I read other information saying this should be sow in March or April. So I am quite confused by the amount of different information and I don't know what to believe.
In conclusion: can I sow in January? what can I sow in zone 6b? Which source of information is the most reliable?
0
Posts
Seeds need warmth and moisture to germinate. Some like it dark and some like some light but all need plenty pf light the minute they produce their first leaves or they get etiolated - thin straggly and weak because they're seeking light instead of short and sturdy.
Unless you have a warm, light space to grow them and plenty of room, light and space in which to prick them out and grow them on I would advise waiting for late March/early April when light levels are better. Having said that, chilies and tomatoes do benefit form an early start so you could have ago at those. They are perennial so can be kept from one year to another if you can give them good growing conditions. I would buy onions as sets to get a head start but otherwise wait to sow and pant till there's more light and only light frosts likely.
Celery needs a lot of water so wait till it's warmer and can go out in the rain. Lettuces also need good moisture levels and light to grow crisp and juicy or they'll go tough and stringy.
"We don't stop playing because we grow old; we grow old because we stop playing." - George Bernard Shaw
I will take measurements of my outdoor space for more precise information, but I think I have a decent space to grow something and plenty of sunlight. I live in one of the warmest cities in Poland. Plantmaps says mi city is 6b and Wikipedia says mi city is 7a so again I don't know which one to believe.
I agree with what Obelixx has said, except for tomatoes which I would never keep for another season. The plants always die anyway when it gets cold, they aren't hardy, and they can be prone to disease. I sow tomato plants in March and they are ready to plant outside in late May.
"We don't stop playing because we grow old; we grow old because we stop playing." - George Bernard Shaw
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
As for onions, have a good read of this info from the RHS - https://www.rhs.org.uk/advice/grow-your-own/vegetables/onions
They do tomatoes too
https://www.rhs.org.uk/advice/grow-your-own/vegetables/tomatoes
and chilies
https://www.rhs.org.uk/advice/grow-your-own/vegetables/chilli-pepper
"We don't stop playing because we grow old; we grow old because we stop playing." - George Bernard Shaw