I'll probably regret saying this, but the last couple of years mine have been OK, and there are still some in the ground now
Sowed Mid February, potted on into trays when they had two true leaves, then on into 5cm modules when the plants were growing strongly
Prepped the soil with plenty of allotment compost, plus BFB, then added chicken manure pellets in each hole when planting out, which was around early April. Grew them in a grid 30 cm apart, and cloched them until frosts were over, just t make sure they kept growing
Watered weekly even if it had been raining, with a good soak, and fed with BFB once a month, scratched ino the top of the soil
Mulched with home compost about 5cm deep late Summer
Took off any leaves that started to brown/look old, tearing them off
Carried on with the watering right up until beginning of November, including the odd bit of comfrey feed as they were next to the Tomatoes
The variety was Monarch, came free with a mag last year, so nothing special. The biggest was 18cm in diameter, average more like 12-14ccm, with a couple of tiddlers
Hope that helps