Cannabis Asexual Propagation. Asexual Propagation. Soil Treatment.
Solid media provide anchors for cuttings, masses of darkness to market etiolation and root expansion, and satisfactory air movement to the young roots. A top quality soil with good drainage such as that used for seed germination is frequently used but the soil must be scrupulously sterilised to stop the growth of damaging bacteria and fungus. A bit of soil can simply be sterilised by spreading it out on a cookie sheet and heating it in a range set at “low, ” roughly 820 C ( 180 F ), for thirty mins. This kills most damaging bacteria and fungus as well as nematodes, in sects and most weed seeds. Overheating the soil will cause the breakdown of nutriments and organic complexes and the formation of poisonous compounds. Big quantities of soil could be treated by chemical fumigants. Chemical fumigation avoids the breakdown of organic material by heat and may lead to a better rooting mix. Formaldehyde is a brilliant fungicide and kills some weed seeds, nematodes, and in cults. One gallon of commercial formalin ( 40 percent strength ) is mingled with fifty gallons of water and slowly applied till each cubic foot of soil soaks up 2-4 quarts of solution. Little boxes are sealed with plastic bags ; large lofts and plots are covered with polyethylene sheets. After twenty-four hours the seal is removed and the soil is permitted to dry for a couple of weeks or till the odour of formaldehyde is now not present. The treated soil is soaked with water before use. Fumigants like formaldehyde, methyl bromide or other fatal gases are terribly dangerous and cultivators use them only outside with appropriate protection for themselves. It is customarily easier and safer to use a synthetic sterile medium for rooting. Vermiculite and perlite are sometimes employed in propagation due to their wonderful drain age and neutral pH ( a balance between astringency and alkalinity ). No sterilization is required because both products are made at extreme heat and include no organic material. It’s been revealed that a mix of equal portions of medium and massive grade vermiculite or perlite promotes the best root growth. This results from increased air movement round the bigger pieces. A feeble nutrient solution, including micro-nutrients, is wanted to wet the medium, because minimal nutrient material is supplied by these synthetic media. Solutions are checked for pH and corrected to neutral with rural lime, dolomite lime, or oyster shell lime.
