I prefer growing my chilli plants by using the drip system. The two advantages to this system are firstly you are only watering the plant and not the parthways, thus saving on water, which has become a valued resource.
Secondly drip avoids wetting the leaves so that we do not have to use fungicide sprays on our chilli plants. In other words good growing conditions are the best form of preventing disease and thus the use of harmful sprays.
Other than lots of sunshine, chilli plants require lots of water, good drainage and nutrients. Because of our long dry summers we plant 50.000 plants per hectar. Normally you would plant 40.000 plants per hectar.
Chillies are best grown in hot, dry summer climate with a winter rainfall to replenish the water used in the summer just like here in the Western Cape, South Africa.