found this on hash growing for idiots
Hemp seeds from angling suppliers are very variable in quality and germination rate. They are treated, but most still manage to sprout (despite what Rik might say). Only use those that form sprouts over a centimetre long.
Choose seeds for their size and colour. The large plump ones with good colour, black, brown, grey or mottled have the best chance of germinating. Seeds that are old, badly bruised or immature (green or white) are probably not viable. If they are all you can get, you'll have to plant a lot of them and hope that some exceptional specimens "take".
Seeds are rarely viable after about three years, and should be stored in an airtight container. The crisper section in your refrigerator is an ideal place; dark and cool. You can get some idea of the viability by placing a seed between your thumb and fore-finger. If the seed does not crumble when pressed hard, it is probably viable.
Many books recommend that a germination box should be built to start the seeds in. This is an extra hassle that is not necessary. Transplanting the seedlings from one medium to another often subjects them to transplant shock, which will delay growth. With the following procedure you'll not have any problems. If you underwater your plants, they will wilt. Plant cells are kept rigid by
Soak the seeds overnight in a glass of water or in wet towels to give them a head start in the water absorbtion stakes. Adding about a teaspoon of "Domestos" (double for thin bleaches) to half a pint of water will prevent fungus forming on the seeds. It does not harm the seeds in any way, believe me.
Poke 5 or 6 holes about 1/4 - 1/2 inch deep and evenly spaced in each pot. Place one seed in each hole and cover lightly with soil. Carefully, so as not to disturb the seeds, moisten the soil and keep it moist until the seeds have sprouted.
If you are using a bulk lot of not very viable seeds, put them in a seed tray with 1 1/4" of seed and cutting compost in the bottom. Moisten with a sprayer and, as mould from rotting seeds will be a problem, spray with "Benomyl" or another fungicide if you know of a better one. Scatter many seeds over the surface, sprinkle compost over the top to only just cover the seeds, and dampen with water and fungicide. Put an incubator top on, or put it inside a clear plastic bag. These precautions are not necessary with good seeds, but then the ones you find in bird-seed aren't particularly renowned for their quality.
The seeds will sprout in three to fourteen days, depending on their variety and viability. If you have only a few seeds and want to give them the best chance possible, plant them pointed end up. The seedling will then expend the least amount of energy breaking through the soil. This is not critical and is unnecessary if you have plenty of seeds.