Watching this thread with interest, Nobody in my household actually like super hot burning chillis, but I like growing them because they make fabulous plants that look attractive and I can give my neighbours loads and get plums etc in return.. From so far that I read in this thread.. there are loads of folks who are trying their best with far from optimal conditions.. yes, you can germinate seed in an airing cupboard, however especially the more specialist seed really does need quite precise temps.. The next big one I've seen over and over.. people starting seeds in feb etc.. with no greenhouse or more importantly grow lights.. I started my tomatoes 2 weeks back, the reason? If you start them too early they will grow leggy, (ie spindly and be weak) or they stay dwarf for an age.. I originally grew birdeye which i germinated from seeds from shop bought chillis, (my daughter sucked her thumb, the chillis stopped that!) I built (from a kit) a 12 foot by 10 wide greenhouse.. I mainly use for toms but also grow mini cucs and also a few chili plants.. I still have my birdeye, which is near 4 foot tall in a big pot, I just cut it back and stop watering then leave in frost-free greenhouse over winter. To be successful at chilli growing you need a few things, first is a decent propagator, one with a temp control. The scale I grow at, I watched a vid from gardeners world and built my own.. cost about 50 quid, can do 7 seed trays in one go (
http://www.bbc.co.uk/gardenersworld/video/toby_30minfix/index.shtml ) After that you need light and heat.. Ideally 22-30, you also need some shading, especially under glass, be it in a conservatory, or greenhouse, even the cheapo plastic covered ones. Direct intense sun can scorch leaves very easily, chillis are more robust than tomatoes, but still care needs to be taken not to stress the plant, otherwise it may drop all the flowers and worse it's leaves.. Giving feed is a very tricky subject, I've known some who feed every other day, and some once a week, but if you are tending your plants everyday, you soon will get a feel for what they want and what is annoying them.. As for the gnats, I've never had a problem. same for fungus, maybe because they are in a greenhouse, but I ensure excellent ventilation at all times. Do the gnats attack the plants? or are they just annoying floating about the house? You can buy fly papers which you hang up around the plant and they will land and that's them, very cheap too.. otherwise a fine gauze fabric wrapped around the pot and secured to the stem will stop them, you can still water and feed straight through, just them gnats can't lay their eggs!
Anyways waffled loads, hope some helps, I was also a person with zero plant/garden skills, I've learnt most from forums, books, talking to experienced friends and neighbours. I now have 11 raised beds roughly 6x3 ft, produce probably 7 or 8 carrier bags full of toms a year, all our onions, parsnips, salad through the summer, carrots most the year, leeks, garlic. All of which is organic, so prob saves a million quid!!! I've had many failures, but when just one thing works.. such feelings of achievement
Good luck growers I'll be watching your results
(Hopefully we'll have some sun this year, maybe I won't still be picking toms in december!)