Curry leaf can take full sun but in India it is usually seen as an understory plant because of convenience. It is pruned to say 5-6 ft max so it is easy to pick the leaves. Actually, back home it is considered a bit of a weed since most of its seeds will sprout on the ground and you can get enough curry leaves just weeding. The fruit (minus the seed) is also edible when it turns dark.

It does like it to be a bit acidic otherwise it tends to show iron deficiency. In winter it will drop some leaves and it is better to give it some rest. Like citrus it has a tendency to start flowering in spring. Mine is doing it right now.

Mine take a lot of neglect, is about 4 feet tall.

I have a small one, maybe 6-7" tall, in a pot. I don't know much about them at all but hope it does well. If treating it like citrus is best, that should be easy enough - I have it in the same mix. But have been keeping it inside until our lows in the 40s are over.

Wish I had maintained now, but I hated the smell of the leaves. So, if course, now I am looking for a replacement plant.

I found this, which suggests that what I'm doing is in the right direction.

https://citruscentre.co.uk/pages/care-sheets#curry

I have a fast growing cultivar which is around 6 ft , need to prune once i move it out . Every year I get quite a few offshoots from this one and a slow growing cultivar which i started from seed and even after 3 years is still 6 inches tall .

Dappled shade is fine for curry plant however for the Kafir lime I am wondering if the enlarged leaves are due to low light conditions , usually citrus would throw up larger leaves when its in low light .

Devsense: I think you are spot on that the large leaves on kaffir is due to lack of light.

I have two vastly different curry leaf plants and neither of them are fast growing. The taller one is about 3 ft with lots of branches, heavily serrated lighter green leaves, not so fragrant and readily flowers. I am guessing this is the dwarf variety. The second shorter one grows real slow, has rounded (no serrations) thicker dark green leaves, intensely fragrant, reluctant to flower. Could be a gamthi but not sure.

devsense, indeed larger leaves are due to lesser light. This is a common reaction of many plants. In kaffir lime this is a good thing since it is the leaves that I want to use.. Having it in dappled shade also avoids leaf burn in high summer. Our sun is nothing like the sun in tropical conditions since atmospheric humidity tends to be very low in summer.

My curry leaf tree is also quite fast growing once temps are warm enough and produces lots of root suckers. It is about 5ft tall. I will need to repot it fairly soon.