· Organic compost — Make your own or purchase online.
Many growers use commercial pH Up or Down to regulate the pH, but it defeats the purpose of growing organically since chemicals can kill the soil bacteria. Therefore, you can reduce the pH level with white vinegar and increase the ph with baking soda.
Autoflowering cannabis plants need phosphorous right before they begin to flower. At this stage, the plant needs more phosphorous since it’s a transition from the vegetative to the flowering phase. This means that you should use rock phosphate or bone meal from the third week until the fifth week. Phosphorous helps the plant develop larger fruits or buds in this case. From the beginning of the fifth week, a good organic fertilizer rich in potassium needs to be used.
In conclusion, growing cannabis organically is super easy and affordable if you grasp the basics. Various organic fertilizers found in your local garden store can also be used if you can’t be bothered to indulge in “DIY” experiments. Experienced gardeners and DIY fanatics will certainly have a great time making their own potting mixes and fertilizers, but since everything is available commercially, you can still produce great yields.
A note on the pH
Mix one nutrient at a time – When preparing your nutrient solution or adding supplements, add each part separately so that the minerals dissolve evenly into the water.
Choose nutrients suited to your grow medium – Natural fertilizers are well suited for soil grows due to their slow release, as well as the lack of residue they leave behind. Synthetic/liquid fertilizer is best for hydroponics systems and other soilless mediums because nutrients in this form become directly available to plants where they do not have a substrate to attach themselves to.
Recommended NPK ratio: 10:10:5
Feeding Schedule For Autoflowers
Autoflowering cannabis plants have an almost non-existent vegetative phase and basically jump straight from seedling to flowering. To get the most growth out of your plants, it may be a good idea to start adding more nitrogen into their diet so that plants develop strong branches and leaves before the pre-flowering stretch. A healthy autoflower begins vegetation at about 10 days from seed, or once the first 5 finger leaves develop.
Soil – Most soils for growing cannabis contain the right micronutrients and macronutrients to give autoflowers enough food to sustain them until the end of vegetation. If you notice yellow leaves before flowering start feeding but with a light dose, working your way up with each feed if the plants are handling it well.
Nutrient burn during their cycle may result in an overall decrease in yields, so take care when you begin feeding autoflowers and preferably start with diluted strengths (1/4 or 1/2 the stated amount) to get a feel for how much the plants can handle.
Hydroponics – In a hydroponics system, it is recommended to fill the reservoir with a weak nutrient solution once plants have 3-4 sets of leaves, unless they need it beforehand. Watch out for any signs of deficiency so you can be ready to feed from the moment the plants ask for it.