How to Grow Weed in a Greenhouse

How to Grow Weed in a Greenhouse

Starting any kind of garden is a rewarding experience. Sowing small seeds and waiting for sprouts is like counting the days until Christmas morning as a child. Then, when you take good care of them with love and attention, you will be rewarded with a good harvest. Whatever you are growing, we are here to help you with practical advice on what to grow in the greenhouse, how much it will cost, and whether you choose cannabis. -The perfect strain for your marijuana greenhouse.

What is a greenhouse?

Greenhouses are outdoor structures made of durable frame material covered with a transparent layer of special plastic. The purpose of the greenhouse is to grow fruits and vegetables, herbs, plants and, of course, marijuana.

People usually choose to use greenhouses rather than grow outdoors for better control of the environment. Greenhouse weeds often grow faster and give better results because the plants are protected from natural elements, are high in carbon dioxide and have a constant temperature.

Greenhouses are made of different materials and come in different styles and sizes. For example, if you’re looking for a small house on a budget, you can make a simple hoop house using PVC pipes and painter’s plastic. Alternatively, if space and budget allow, you can build an industrial greenhouse with automatic ventilation and temperature control, and the installation of large fans.

Greenhouse shapes can be Gothic, A-frames, dome, tunnels, single-sided roofs, gables, flat arches, and a variety of other shapes to meet growing needs and space availability. No matter where you place the greenhouse, keep it in the sun for at least 6 hours each day.

What to grow in the greenhouse

Greenhouses are the most versatile way to grow almost all types of plants. You can use pots of all sizes, raised floors, hanging planters and trellis, but you can also grow them directly on the ground. Greenhouses are suitable as a starting point for eventually growing outdoors in the months of summer, or as a permanent home for plants to survive their life cycle.

Flowers love the heat and humidity in the greenhouse, and even cold climate crops such as lettuce, broccoli and pea beans work well in the comfort of an unheated greenhouse. At the peak of summer, watch tomatoes, pumpkins and cucumbers bloom rapidly in the greenhouse. However, if you do not have access to the outdoors, be sure to perform hand-pollination. Pollen mater go inside.

More and more people are building greenhouses for cannabis and producing excellent crops. Growing cannabis in a greenhouse is the perfect combination of harnessing the power of the sun to do it in a completely outdoor environment and providing protection and control as it does indoors.

How many cannabis plants can you grow in a greenhouse?

Each state in the United States has various laws and regulations regarding adult use and medical marijuana. For example, each household can grow up to four recreational plants in Oregon. If you have a medical marijuana card, you can grow 6 plants per patient’s household.However, these numbers and increasing requirementsVaries by state..

Once you know how much you can grow, you need enough space to accommodate the growing plants. Using high quality marijuana fertilizers and providing the plants with optimal soil and sunlight can be expected to produce large amounts of cannabis before they are ready for harvest.

In general, it’s best to use pots in a marijuana greenhouse so you can move them around as needed. If you use this route, plan an area of ​​at least 8 x 8 feet for each plant once it is in the final container. Your plant needs enough space for proper air flow. In addition, it is difficult to work in or around overcrowded vegetation.

Choosing the final pot size for a mature plant can result in a smaller end of around 65 gallons, but some California and Oregon growers harvest in 100 or 200 gallon pots. There is also something to do.

Can you grow weeds in the greenhouse all year round?

Growing weeds in the greenhouse all year round depends on where you live and what your setup looks like. Well-designed marijuana greenhouses are built to sustain life in all climates. However, even in winter-filled areas, greenhouses with heating elements can grow all year round. In addition to the heater, auxiliary lighting may be needed to make up for shorter days. These lights don’t provide enough heat to prevent frost from damaging cannabis, but they do help a bit.

However, if you live in a place with a significant amount of snowfall, the greenhouse is vulnerable to damage due to the weight of the snow falling on it. You can prevent this by choosing an A-frame or Gothic style structure.

Items needed to start growing the greenhouse

In addition to cannabis seeds and starters, you will need the following items to start growing your greenhouse:

  • Greenhouse framing material
  • durability cover
  • Fan / ventilation
  • Smart pot or similar
  • Selected soil or growth medium
  • High quality nutrients
  • Access to the reservoir and plenty of freshwater
  • pH meter and adjuster
  • thermostat
  • Trellis material

When deciding on the best time to grow weeds, you may want to look at a light deprivation system. Light Dep helps maximize production when growing multiple crops a year.

How Much Does It Cost to Start a Greenhouse

It is difficult to determine the price of a greenhouse until you know the price of the greenhouse accurately. A basic DIY greenhouse with an aluminum frame and a layer of polyethylene (PE) plastic costs about $ 15-20 per square foot and does not include the cost of lighting, heat, or other growth materials. A custom greenhouse with all bells and whistles (including an automated light depp system) costs about $ 35-40 per square foot.

If you’re familiar with construction and your goal is to reuse materials to build the best greenhouse possible within your budget, you can remodel a 1,000-square-foot greenhouse for about $ 10,000 and use a light-deep system. Can be included.

Once you have built a greenhouse, you need to consider the material costs of each plant, such as lighting and heating equipment. Before you start, keep your calculator handy and do the calculations.We have a lot Costs to consider Before you start your greenhouse growth.

Pros and cons of growing weeds in the greenhouse

If you’ve already decided whether to grow indoors or outdoors and settle in the middle of the greenhouse, weigh the pros and cons.

Strong Points

  1. Extension of growth cycle and options to grow all year round
  2. Protection from elements (including deer, rabbits, rodents, etc.)
  3. Microclimate control to dial ideal plant needs
  4. Consistent harvest every year
  5. Eco-friendly (and cheaper!) Than growing indoors


  1. Depending on the climate, energy costs may increase for heating and lighting in winter.
  2. Smell and aesthetics may be unpleasant for neighbors
  3. Can easily occupy a large amount of space that may be useful for other things
  4. Construction may be expensive depending on the material
  5. To work smoothly, you need to be more careful than cultivating outdoors.

If you’re ready to build a greenhouse, don’t assume that you can guess the size you need. Do a little strain research first to find out how big the plant will grow when fully mature. If you want to diversify your garden, enjoy fresh produce in the summer, leaving some extra space for some tomatoes and cucumbers.

The best strain to grow in the greenhouse

The best strains for growing in the greenhouse are feminized autoflowers and day lengths. Auto-flowering cannabis itself switches from the vegetative stage to the flowering stage, so you don’t have to worry about the light schedule. This means you don’t even have to worry about the Light Dep system. These strains include Purple Punch, Strawberry Banana, Frisia Dew, Wedding Glue, Aurora and White Widow.

Feminized seeds of day length are another excellent option for greenhouse cultivation. However, using a light dep setting works better. These strains bloom naturally when the lighting changes from late summer to early autumn. The highest yielding greenhouse strains include Blue Dream, Sour Diesel, Super Silver Haze, Critical Kush and Skunk XL.

Is the greenhouse growing right for me?

If you’re still not sure if it’s the right choice for you, ask yourself the following questions:

  • Do you have the time and money to build and operate a greenhouse?
  • Is there space to accommodate my plans?
  • Is there easy and unlimited access to freshwater at this location?

Starting your cannabis greenhouse is a big project that gets a lot of rewards. Regardless of the size or strain you choose, you will definitely advance your cultivation knowledge and hopefully end up with some of the best shoots.

With two decades of dedicated experience, Nuggs is a seasoned cannabis writer and grower. His journey has been a harmonious blend of nurturing cannabis from seed to harvest and crafting insightful content. A true expert, they've honed strain-specific knowledge, cultivation techniques, and industry insights. His passion shines through enlightening articles and thriving gardens, making them a respected figure in both the growing and writing facets of the cannabis world.

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