Finding new way to grow rosemary

Hello, I'm April from Indonesia. I really wanted to grow rosemary in my garden. I tried several method and failed miserably, which ended up as my rosemary died out (the leaf turning brown and probably the root kind of decomposed).
Is there any ways or probably planting media that I need to use in order to grow my rosemary.

Note: I brought the plants online and tried to use soil with fertilizer when doing the re-potting.

Hello April, welcome.

I have had bad luck with rosemary, too.  I learned I was giving it too much water, and that it shouldn't be fertilized.  I looked at this website:  https://www.wikihow.com/Grow-Rosemary although it starts with cuttings.  Mine grew just fine outside in the garden, but I've never been able to grow it inside.  Probably inadequate drainage in the pot, or too much watering!

Wow April, Indonesia, beautiful!
I would think rosemary would do great there. I need to plant it against a southfacing wall to really get it going. The wall sucks up all the sun in the day and sends the heat back out in the night, I don't think you will have this problem in Indonesia.
What could have gone wrong is that it was too wet. They don't mind rain and stuff, but they don't like it when they're in water all the time. They need drained soils. Not very fertile either. So a raised bed with a rocky/ sandy soil mix would be good.
How many light hours do you have average, here it likes full sun, maybe in Indonesia, the sun is much brighter and stronger and it will be a shade plant.
Hard to know.

Isn't there some public garden you could visit? Somewhere where they grow mediteranian plants and shrubs in Indonesia? Then you could copy the circumstances and grow some rosemary close to where you live. They are quite easy to propagate from cuttings in winter. But you have no winter.. hmmmm complicated! It's even more complicated for you, because if we want to grow tropical plants we can put up a green house, but how to mimick winter?? Mountain nurseries maybe.

Did you know rosemary is great for hair? I've made 3 liter hydrosols, when my daughter found out it was good for her hair, she used a liter in a week.Takes me three month. Girls!

But on a serious note, i've given some general advice, but find out how it's done by pro's in Indonesia, what soil, what place, what kind of light do uyou need and how to propagate. Maybe seed works better where you are than here. Can't be worse, here it doesn't work for me so far.

Good luck April.

As others have said, rosemary grows best in a drier climate.  Perhaps add a lot more sand to your potting mix to keep it from rotting in saturated soil.

Once established, I've found that rosemary grows for years and years without any care whatsoever, but our climate is very dry 9 months of the year.

Best of luck.

I've had success with planting it on little mounds to raise the crown of the plant a little above ground level so it doesn't stay too damp. To help with drainage, I've also seen people mix a little gravel or small rocks into the planting hole/mound. Since it can be a short-lived perennial, I often root stems as potential backup plants by keeping them in a glass of water in the window.
The wood tends to be pretty soft so when the branches get too big they tend to split at the "crotch," which makes them prone to infection/disease. If I prune them hard twice a year, this lessens the weight of the branches and minimizes the splits. While I've had plants live 8-10 years, most of them have lived an average of 5-7 years, because I frequently get behind on the pruning schedule