There are some complications in working with organic fertilizers. The main issue is if your weed plants have a nutrient deficiency, it takes longer for a plant to absorb organic powder nutrients, which can increase the damage to plants. Liquid nutrients act much quicker. Other disadvantages:
Indoor growers typically use liquid nutrients and mix them in with water before watering plants. Using liquid nutrients is usually more time consuming, as you typically have to measure and mix them in water 1-2 times a week.
Cannabis plants need different amounts of these nutrients throughout the different stages of growth: more nitrogen during vegetative growth, and more phosphorus and potassium during flower for bud production—also called “bloom” nutrients.
Compost tea recipe for marijuana plants
Most of these fertilizers can be purchased cheaply at your local nursery and then mixed into soil before potting outdoors. Done correctly, you’ll only need to water your plants throughout the growing process, as all nutrients are in the soil.
The tea can be applied to roots or as a spray on leaves of your cannabis plants. Dilute the tea with water at a ratio around 1:20 when applying it to roots. A basic tea can’t harm or burn your plants, so you can apply a potent dose freely. As a foliar spray, compost tea is generally diluted with water at a 1:2 ratio.
Additionally, cannabis plants derive these non-mineral elements from air and water:
What nutrients does a cannabis plant need?
There are many different cannabis nutrients out there and it may be overwhelming knowing where to start. Here’s a breakdown on some of our favorites.
Some growers also find that growing organically increases the flavor profile of finished cannabis as well as increases yields.
Simple Duos – Use one bottle for the vegetative stage, and the other bottle for the flowering stage.
Recommended Soil Nutrients
Major Deficiencies May Appear if You Don’t Add Nutrients
Summary of a Marijuana’s Nutrient Needs in Soil
Test and adjust the pH of your water to get faster growth and prevent nutrient deficiencies in soil
If a marijuana plant doesn’t receive enough of a nutrient, it will show signs of a deficiency. Let’s explore this issue in greater detail below.
Marijuana plants use magnesium in very high amounts. If you believe your plants aren’t getting enough, use Epsom salts to deal with the issue. Make sure you distinguish between an iron and magnesium deficiency. Otherwise, you could end up over-fertilizing your plants.
Crucial Cannabis Nutrients and Deficiency Symptoms
Your marijuana plants only need a tiny amount of molybdenum, which means a deficiency in this micronutrient is rare. It plays a role in a pair of important enzyme systems that convert nitrate to ammonium.
You can correct a deficiency by purchasing fertilizer with the right NPK ratio. Quick treatments include urine and bat guano. If you spot a nitrogen deficiency, act fast because your plant’s yield will be significantly affected otherwise.