Skunky has wrote the Bible, thus far. What He said is perfectly true. Spreading Blood Meal does well to keep out a lot of wild animals, and it's good for your soil. Do the math, if your strain says 250 grams per plant, or 700 grams, that is what you should expect. If you buy the best "Living" organic potting soil, that will do well in sprouting the seeds in. The key is the temp. & moisture level. You'll want to soak your seeds for 24 hours in good clean water that is a constant 70 degrees. In a large tray, fill with good potting soil, wet it with 80 degree or hotter water(the cool soil will absorb a lot of the excess heat), then sprinkle the seeds every 2 ", and then sprinkle dry & very fine potting soil evenly over the seeds, about 3'8th's inch(once wet, it will compress, rule of thumb, whatever the size the seed is, that's how deep it should be planted). Then, with a mister, water spray the top soil with 70 degree water, and keep the soil & air temp at 70 degrees. Thus, heating pads. If the temp is correct, and the rooting system isn't crowded, you should get a 60 to 40% Female to Male ratio, at least. The rockwool does well also, unless you plant them upside down. Liquid Seaweed is a good root stimulator, a little (1/2 TBS per Gal.) wouldn't hurt. Point, you should get at least 100 females, period. Good luck. BTY, spray mist every day, or more. Seeds sprout during the Spring rains, if they get dry, they will not germ, or become males.