Tea tree oil is an anti-fungal and anti-bacterial substance that will help to clear up dandruff in a week or so.
Use a solution of whipped yogurt to which a few drops of lime. This can be applied and left for an hour.
Soak a few fenugreek seeds in a cup of water overnight and rinse out your scalp with this water.
You can also apply freshly squeezed onion juice to your scalp. This is an effective remedy in getting rid of dandruff as well as strengthening the roots of your hair.