During the Vegetative Phase, Cannabis Needs What?

Cannabis plants need a lot of different things during their vegetative phase in order to grow properly. From the right amount of light to the right nutrients , there are many factors that can affect a plant’s growth. In this blog post, we’ll go over some of the things that your cannabis plants will need during their vegetative phase.

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The vegetative phase

The vegetative phase is the stage of a plant’s life cycle that occurs between planting and flowering. During this phase, the plant is growing and developing its leaves, stems, and roots. The vegetative phase is critical to the plant’s development and its eventual yield.


Cannabis plants need light to grow, but not all light is created equal. Different types of light can have different effects on plant growth, so it’s important to choose the right type of light for your needs.

Cannabis plants can be grown under a variety of light sources, including natural sunlight, artificial lighting, or a combination of both. The best option for your plants will depend on a number of factors, including your budget, the amount of space you have available, and the climate in your area.

Natural sunlight is the best option for cannabis plants, but it’s not always practical or possible. If you live in an area with long winters or very hot summers, you may need to supplement your plants with artificial lighting.

There are a variety of artificial lights that can be used to grow cannabis plants, including incandescent bulbs, fluorescent tubes, metal halide lamps, and high-pressure sodium lamps. Each type of light has its own advantages and disadvantages, so it’s important to do your research before making a decision.

Incandescent bulbs are the least expensive option, but they also produce the least amount of light. They are not an efficient choice for growing cannabis plants.

Fluorescent tubes are more expensive than incandescent bulbs, but they produce more light and are more energy-efficient. They come in a variety of shapes and sizes, so you can choose the right type for your needs.

Metal halide lamps are more expensive than fluorescent tubes, but they produce more light and have a longer lifespan. They are also more energy-efficient than both incandescent bulbs and fluorescent tubes.

High-pressure sodium lamps are the most expensive option but they produce the most amount of light. They are also the most energy-efficient type of artificial light available.


Cannabis plants are very sensitive to temperature changes. During the vegetative phase, the ideal temperature for your cannabis plants is between 70 and 80 degrees Fahrenheit. If the temperature drops below 60 degrees Fahrenheit, your plants will start to experience stress, which can lead to reduced yields. If the temperature gets too high, above 90 degrees Fahrenheit, your plants will also start to experience stress.


During the vegetative phase, cannabis plants need a humidity level of 40-60%. Too much humidity can cause mold and mildew to form on the plants, while too little can cause the leaves to dry out and become brittle. If the humidity level is too low, you can raise it by using a humidifier or by setting a pan of water near the plants. If the humidity level is too high, you can lower it by using a dehumidifier or by opening a window to let some of the moisture out.


During the vegetative phase, Cannabis needs three macronutrients: nitrogen (N), phosphorus (P), and potassium (K). These are commonly referred to as NPK. The vegetative phase is when the plant is growing leaves and stems, but no flowers or buds. You can encourage your Cannabis plant to grow faster during the vegetative phase by giving it plenty of NPK.

Cannabis also needs micronutrients, which are minerals that are required in small quantities. The micronutrients that Cannabis needs are iron (Fe), manganese (Mn), zinc (Zn), copper (Cu), boron (B), molybdenum (Mo), and chloride (Cl).

You can give your Cannabis plants these nutrients by using a commercial fertilizer or by adding them to your soil mix. Be sure to follow the directions on the fertilizer package, as too much of any nutrient can be harmful to your plants.

The flowering phase

It is important to know that during the vegetative phase, cannabis needs a lot of light. If you are growing indoors, you will need to provide your plants with at least 18 hours of light per day. The flowering phase is when the plant produces flowers, which are the parts of the plant that contain the THC.


During the vegetative phase, cannabis plants need about 16-18 hours of light per day. They can tolerate a wider range of light intensity during this stage than they can during flowering, but avoid letting the leaves burn. The amount of light your plants get will affect how quickly they grow. If you want them to grow quickly, give them more light. If you want to control their size, give them less light.


During the vegetative phase, ideal temperatures for cannabis are between 68-77°F (20-25°C). If the temperature drops below 68°F (20°C), growth will slow. If it gets much hotter than 77°F (25°C), your plants may stop growing altogether. Temperatures that are too high can also cause your plants to produce fewer flowers (buds).


During the flowering phase, cannabis needs what? Proper humidity levels! Too much humidity can lead to mold and mildew, while too little humidity can cause your buds to become dry, crisp, and less potent.

The ideal relative humidity (RH) level during flowering is between 40% and 50%. Many growers use a RH level of 45% during flowering. You can maintain proper RH levels by using a hygrometer and a dehumidifier or humidifier in your grow room.

If you live in a dry climate, you may need to use a humidifier to raise the RH level in your grow room. If you live in a humid climate, you may need to use a dehumidifier to lower the RH level in your grow room.


During the vegetative phase, your cannabis plants need lots of nitrogen (N) to grow big and strong. They also need some phosphorus (P) and potassium (K), but not as much as N. An NPK ratio of 20-10-10 is a good starting point for most cannabis strains.

As your plants enter the flowering phase, their nutrient needs change. They now need more phosphorus (P) and less nitrogen (N). An NPK ratio of 10-30-10 is a good starting point for most cannabis strains during flowering.

Your plants may also need other nutrients, such as calcium, magnesium, and sulfur. These nutrients are often called “secondary nutrients” or “micronutrients.” Most cannabis strains don’t need extra calcium, magnesium, or sulfur, but some do. Check the label of your nutrient products to see if they contain these micronutrients.

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