I heard of this plant called marijuana that’s supposed to be pretty useful ;)

Seriously though, if you have a sunny window in your kitchen, lots of herbs are pretty nice to have on hand. Basil, oregano, thyme. That kind of thing. Just snip off what you need when you’re cooking!

Pac Choi (Chinese cabbage)- grows quickly, especially the baby Bok Choi varieties, and it makes great stir fried. From seedling to eating is about 45 days.

Edit: it needs nutrient rich soil and full sun (from a UV plant light)

Hm, maybe an avocado tree? Takes forever, but once they start producing fruit they can be really handy. Your best bet would be to find one that is already well established if you want to see results soon.

This isn't practical at all, but I'm growing some monstera deliciosa in the hopes that one day it will produce fruit. I really want to find out what it tastes like, they're supposed to be amazing.

I've grown some scotch bonnets, coriander and a few fruit trees from a seed but not with very much success. My lime tree was rescued by my sister, the mango by my step-mom.

The only one I've managed to not kill is the dragon tree I have but apparently they purify the air a bit.

To add to that I have a garden so tomatoes, herbs... are grown there. Also unfortunately the plant mentioned there (made a ontments few years back) is on my garden and I couldn't get rid of it.

So I am looking for something that could be grown only indoors in my area central Europe.

*This is defederation is dumb I can't see your comments through my instance.

Lavender, basil, onions, rosemary, leaf lettuce grows incredibly fast, any type of mint is very fast growing and smells wonderful when you walk by it.

Overall though, a lot of spices can be grown indoors quite easily. Bamboo can grow pretty good if you have the right environment. Bean sprouts are pretty easy as well.

You can grow all kind nof useful things. And many things are useful to different people for different reasons lol.

I have a lot of spinning(wool/fibre) friends that grow plants indoors for dyes which is pretty cool because plants don't dye the way you'd think they would. It's fun to play around with :]

Coffee seems to grow well indoors and it's also a beautiful plant. If you want blooms and beans though you will want to buy a more mature one. Can take years to reach blooming size.

Lettuce grows so fast and so easy. If you're looking for indoor herbs/veggies, I'd recommend an aero garden or other hydroponic set up. Everything grows pretty quickly and easily.

We had basil growing in a little hydroponic fish tank for some time. Very useful in cooking, can even add to salads.

I'm growing a couple edible plants hydroponically with simple kratky systems. I've got a couple basil plants, oregano, mint and red peppers. I trim their roots once in a while or else they die and rot, killing the plants. This does however cause them to give more energy to new root growth instead of leaf/fruit growth. But I mostly grow them for the fun of it, so I don't mind. The peppers are doing pretty well after two years and gave a half kilo harvest last year, which made wonderful fermented hot sauce. I start the basil and mint over every couple months using propagated clippings.

I always wanted to try lemongrass, maybe that could be interesting for you as well?