I’ve had a lot of success with basil indoors in a sunny position. Even indoors the coriander is pretty fickle. I’ve not had a lot of success with either basil or coriander in the garden, but am persisting in trying to find the right spot. I am hoping to get a couple of self-seeding patches of coriander growing if I can find the right spots.

In theory you can use varying micro-climates in the garden to extend the growing season, so I am trying a shady spot next to the house that will hopefully keep corriander growing a bit later in summer (but may be too shady over winter) and will try another position that is sunny over winter and hopefully get it producing earlier in the season (but will send it to seed earlier over summer).

The parsley I mostly just let self seed - I have found that the flat leaf and curly leafed varieties seed at slightly different times, so I will usually have one of the two growing well. They also grow at different times in different spots, and there will often be seedlings popping up in new spots while other plants are more established - having crops at different stages is mostly a matter of selective weeding rather than specific planning with parsley!