The nitrogen uptake is most intensive the first 6 to 8 weeks, while potassium and in particular phosphorous are needed more during flowering and seed formation. Growing Conditions Hemp prefers a mild climate, humid atmosphere, and a rainfall of at least 25-30 inches per year. Good soil moisture is required for seed germination and until the young plants are well established. Weed Control Industrial hemp is an extremely efficient weed suppressor. No chemicals are needed for growing this crop.
Industrial hemp is a low maintenance crop.
There are no registered chemicals for weed control in hemp. A normal stand of 200 to 300 plants per square meter shades out the weeds, leaving the fields weed-free at harvest for the next crop. Notice the canopy effect created by the dense planting. When properly planted and cultivated, weed control is a non issue. The best time to seed hemp should be dictated by the weather and soil conditions, rather than the date on the calendar.