I live in Bangalore , India. I have been trying to grow coriander and mint at home for the last 6 week unsuccessfully. The Coriander seed never seem to germinate in the soil and the mint cuttings (got from the grocery store near by) wilt and never root in the pot…

Can you please tell me the right way to grow there herbs.

Mint is usually so easy to grow that people treat it like a weed. Are you trying to grow it in a pot or in a garden?

I would buy some potted mint from a nursery. It does like sun and moderate moisture, but once you have it in your garden you will always have it.

I don't know about the coriander. But I would try the mint from seed. Or at least get a start of mint that is already rooted. Maybe a neighbor?
Do you use root hormone?
http://www.hydroponics-garden.com/product.php?productid=2597&cat=0&page=56

Can you buy the plants themselves? If so, buy them and grow the indoors near light or outdoors. I grow both of the, the coriander or cilantro grows better in part shade.

I planted coriander in my garden last November. I watered it regularly for a couple of weeks, but nothing came up. So I stopped watering and forgot about it.

Three months later, I noticed I had plants. They grew slowly for the rest of the winter with almost no rain (Southern California), then shot up and flowered once the area they're in started to get more sun.

So if my experience is any indication, patience is the key. I was also able to grow them in trays indoors fairly quickly, but they only got about an inch tall before succumbing. Possibly too moist.

If you are having trouble getting your mint cuttings to grow, try this: when you bring them home, put them in a glass of water and set in a North window or in a shady place outside. They should start to root in a week or so in the water (change it frequently). After you get some roots, you can plant it in a pot. Mint likes to grow in a cool, damp place. It will tolerate a little morning sun. Be sure to grow it in a pot!!! Do not grow in the ground as it is VERY invasive!!!

Coriander/Cilantro also grows best in cool temps. Here in Northern California, my coriander sprouts in February (they self sow). The plants in full sun are now starting to go to seed (too warm). Try growing them in the shade or in the coolest part of the year (or both!!).

Good Luck!!

Coriander is fragile and does not do well indoors! Plant in a partial sun and shade area so it does not wilt from heat or decay from shade and moisture. It requires well drained location. Mint needs to have roots, so either buy the plant at a nursery or put your cuttings in a glass of water until roots form. Then either take your new plant or your "starts" from cuttings now with roots, and plant in a VERY MOIST place in partial sun like half day.Most people grow mint by a hose valve turn on, because they often leak when you put a hose on and so the mint receives water even when you water elsewhere from the drip! Good luck!