Molasses is often overlooked among the many nutrients and additives available to cannabis growers, yet it is one of the best supplements. Molasses isn’t just rich in valuable nutrients, but it also has the ability to improve the soil, the very foundation of your grow. In addition to that, it provides many other benefits for healthy plant growth. It helps prevent common problems when growing cannabis, for example by minimising the risk for salt build up. It even doubles as an insect repellent. Let’s have a detailed look at molasses and its benefits for cannabis cultivation.
WHAT IS MOLASSES?
Molasses or black treacle, as it is called in the UK, is a highly viscous, dark substance that is made during refining of sugar. It is made by boiling down sugar cane or sugar beet juice into a thick syrup. Once sugar crystals are extracted, a syrup that remains is called molasses. Different types of molasses are available, they vary in sweetness and in the way they are extracted. Molasses made from sugar cane is often made into sweeteners or used as a flavouring for foods. Sugar beet molasses, on the other hand, has an unpleasant smell and is unpalatable, so it is normally used as an animal feed additive. Not all types of molasses are suitable for growing. Some molasses of low quality can contain undesired additives, such as preservatives and chemicals that you definitely don’t want in your garden. Make sure you look for organic molasses that is suitable for gardening.
SULPHURED AND UNSULPHURED MOLASSES
Although any type of molasses will normally contain some sulphur, some molasses made from sugar cane can have sulphur dioxide added, which is why it’s called sulphured. The sulphur dioxide acts as a preservative and an anti-microbial agent to keep the raw cane fresh until it is processed. Sulphur dioxide, however, has a side-effect that makes it unsuitable for our purpose, it also kills the beneficial microorganisms in the soil. So if you’re getting molasses for growing cannabis, make sure that it is both organic and unsulphured.
There are also different types, or “grades”, of molasses, from lighter coloured molasses that is pure sugarcane syrup, to darker molasses and then blackstrap molasses which is denser and thicker than the other types. Blackstrap molasses has undergone multiple boiling and extraction processes, so that it has the highest concentration of vitamins, micro and macro elements. It is very rich in calcium, iron, magnesium, potassium and other valuable elements.
WHY MOLASSES IS EXCELLENT FOR HEALTHY PLANT GROWTH
The soil that you are using to grow your cannabis is arguably one of the most important factors for strong and healthy growth of your plants. Good soil contains nutrients such as nitrogen and phosphorus, along with minerals such as potassium, iron and calcium, as well as many other compounds and nutrients. Each of these compounds is essential for healthy growth of your cannabis plants.
But the nutritional compounds in your
soil, the chemicals, minerals and other inorganic substances are not all there is to make a good environment for your plants. Soil also contains beneficial microorganisms which live in it. These microorganisms are also playing a vital role in healthy growth of your plants.
Molasses is the perfect food for these microorganisms, as it gives them the ideal environment to thrive. When you supplement soil with molasses, what you’re doing is, therefore, not so much feeding your plants, but feeding the soil and the microorganisms in it. Along with providing the microorganisms with the carbohydrates and sugars that they love to feed on, molasses also has other benefits for the soil.
THE BENEFITS OF MOLASSES FOR YOUR CANNABIS GROW
- Feeds the beneficial microorganisms in the soil
- Improves structure and water retention of the soil
- Enriches the soil with various essential minerals and vitamins
- Helps to prevent the build-up of pathogens that could harm your plants
- Helps minimise the risk for salt build-up in the soil, which could cause nutrient problems
- Acts as a natural insecticide against common cannabis pests
HOW TO USE MOLASSES WHEN GROWING CANNABIS
What makes molasses invaluable for growing cannabis isn’t just its benefits for healthy plant growth, but also the versatility in usage. You can use it like a regular nutrient that you add to your feeding schedule, you can make composts and compost teas, use it to prepare a particularly rich soil, or apply it as a foliar spray.
How much molasses you should use, normally depends on the particular strain that you’re growing and its nutrient requirements. The right dosage can also depend on your plant’s age and may be different depending on environmental factors, such as temperatures and light intensity.
When you’re starting out feeding molasses, it is recommended that you start with lower dosages at first. A good starting point can be 4–5ml of molasses per litre of water. Later, when your plants are flowering, you can increase the dosage a bit, since your cannabis plant will need more potassium. Although you can use molasses during all stages of growth, including the vegetative phase, you will likely notice the most benefits during
flowering.
The risk for overfeeding with molasses is considerably lower than with mineral nutrients, but it is smart to observe your plants for any signs of stress or nutrient burn, in particular if you add molasses to an existing feeding regimen. If things look good, you can gradually increase your dosage if needed. You can add it to organic liquid fertilizers, such as
compost teas. If you’re adding molasses to your existing feeding regimen, you should also keep an eye on your soil’s
pH level, since any additional substance can affect it. Make sure you check your runoff pH frequently.
Yes I use Molasses .