backyard greenhouse foundation

Spring is the best season for you to set up a hobby greenhouse. If you hope to have a great horticultural harvest this year, pay attention to spring greenhouse construction.

In addition to setting up a greenhouse and buying gardening appliances, it is important to choose the right foundation for your greenhouse. The foundation of the greenhouse is related to its strength of the greenhouse. Many materials can be used as the greenhouse foundation.

What are the characteristics of your greenhouse? Which material is suitable as the foundation of your greenhouse?

Why install a greenhouse foundation

Greenhouse foundation is a necessary thing. If you want to set up a greenhouse on grass or soil, you need special materials to directly isolate the greenhouse from the soil or grass.

Please discourage any idea of setting up a greenhouse directly on grass or soil, as the greenhouse will quickly slide or collapse, and the grass and soil will be damaged.

build greenhouse foundation

(build greenhouse foundation)

Also, in winter and early spring, grass and soil conditions are unstable. A greenhouse of any material set directly on grass or soil can cause problems and even make a decades-long investment fail.

A greenhouse foundation blocks cold air from seeping into the greenhouse so that heat exchange does not take place.

The Greenhouse foundation also stops insects and other pests from getting inside the greenhouse and harming the plants. 

Principles for choosing a greenhouse foundation


No matter which material you choose, the essential feature is solidity. Your greenhouse foundation must be able to be secured to the ground before you can begin your greenhouse setup. If the greenhouse foundation is not stable enough, it may move. A moving greenhouse foundation can cause a greenhouse investment to fail.

strong built greenhouse foundation

(strong built greenhouse foundation)


It is also important to keep your greenhouse foundation level. Your foundation should not only be fixed to the ground but also level with the ground. If you don't pay attention to this, you will find your greenhouse on a tilt when you set it up. If you plant low-potted plants in a tilted greenhouse, those plants could slip off.

Suitable greenhouse foundation materials

Concrete foundation

Concrete is the most common type of greenhouse foundation material. Many home backyard greenhouses and farm greenhouses use concrete as a greenhouse foundation.


Easy to set up. The concrete foundation can be easily set up in many locations.

Easy to maintain. It can be maintained using only a broom. Occasionally a cleaner is needed to remove stubborn stains.

Protects greenhouses. Concrete foundations prevent rodents from burrowing through the greenhouse.


Waterlogging. Water accumulation harms concrete foundations. However, you can solve this problem with drainage holes.

Expensive. Concrete foundations can be a huge expense in the early stages of greenhouse construction. But in the long run, it is worth the investment.

The process is more complicated. Most concrete foundations are permanent structures. You may need a government permit to have a greenhouse set on a concrete foundation. You need to check with the authorities about this.

Wooden greenhouse foundations

Wooden greenhouse foundations are considered to be the most ornamental type of greenhouse foundation. This type of greenhouse base is commonly found in places such as botanical gardens, large gardens, and home backyards.

wooden greenhouse foundation

(wooden greenhouse foundation)

The best wood should be pressure-tested wood or natural wood such as cedar and redwood.


Drainage is easier. There are gaps between the boards, which is more conducive to drainage.

Better looking. Wooden foundations are beautiful and are often used as backyard greenhouse foundations.

Adjustable. You can adjust the wooden foundation according to the actual use requirements.


Prone to mold and mildew. Natural wood is prone to mold and mildew in long-term use. This is more likely to happen in areas that are wet and rainy throughout the year.

Expensive. Quality preserved wood is more expensive, which can result in more expense.

Contaminates the soil. Relatively inexpensive wood is usually pressure treated, but this type of wood has chemicals added to it. These chemicals can leach into the soil and affect plants.

Plate or brick greenhouse foundation

Plates or bricks are creative greenhouse base materials. Without affecting the normal use of the greenhouse, you can use slabs or bricks as the foundation of the greenhouse to make the whole greenhouse building more beautiful.

brick greenhouse foundation

(brick greenhouse foundation)


Sustainable. When properly installed and used, a greenhouse foundation made of flat panels or bricks can last for years.

Easy to maintain. You can maintain a slab or brick greenhouse foundation with just a broom and simple tools such as cleaning agents.


Expensive. Greenhouse foundations made of slabs or bricks are more expensive than concrete foundations.

More restrictions. If you choose such a greenhouse foundation, it also means that you will only have the option of planting bags or pots for planting.

Soil greenhouse foundation

Soil is the cheapest greenhouse foundation material. The prerequisite for using soil as a greenhouse foundation material is that you need to make sure that the base is flat and level. If you are not sure about this, you can ask a professional gardener to help.

soil greenhouse foundation

(soil greenhouse foundation)


Good drainage. Using soil as a greenhouse base will help with drainage inside the greenhouse.

Low cost. Use soil for the greenhouse foundation and concrete for the legs to be durable and inexpensive.


Flooding and mud. Soil greenhouse foundations can be more challenging in spring and summer. If too much water accumulates, flooding and mud can occur, which can cause the greenhouse to weigh down and tilt.

Pests. Soil is a favorite environment for insects and other pests. They will burrow in the soil. If you plan to use the soil as a greenhouse foundation, pest infestation is a factor you must consider.

What greenhouse foundation is right for your greenhouse

It is worth noting that different styles of greenhouse kits have different greenhouse foundations that are suitable. We use a few greenhouse products as examples here.

56 "x56 "x77" Walk-in Greenhouse

This small walk-in greenhouse is suitable for both indoor and outdoor use. It is a hobby greenhouse that is perfect for the novice gardener and the gardener on a budget. You can grow low-growing plants and potted plants in this.

If you want to set up a greenhouse foundation for this greenhouse, you can choose from concrete foundations, wooden foundations, brick, or sheet foundations. Wooden and brick foundations are relatively more costly and may be less cost-effective options for you.

However, if you do not want to move the greenhouse or want to use the greenhouse for a long time, wooden and brick foundations are excellent choices.

56"x56"x77" Walk-in Greenhouse (2 Colors Available)
  • Size: 56"x56"
  • Height:77"
  • Benefits: Unique Door Design, Large in Size, Wide Side Velcro

Soil foundations can also be an option, but are not the best choice. You should not set up this greenhouse outdoors in summer or winter, the changeable weather will affect your greenhouse and plants.

20' x 10' x 7' Heavy Duty Large Greenhouse

This is a portable large greenhouse that can be set up in backyards, farms, and other scenarios. This greenhouse is suitable for most gardeners and is often used to grow all kinds of plants.

Setting up a greenhouse foundation for this greenhouse requires consideration of cost, location, and other factors. If you have the budget, you can choose from wooden foundations, flat or brick foundations, and concrete foundations.

20' x 10' x 7' Heavy Duty Large Greenhouse (2 Colors Available)
  • Size: 19.7"x9.8"
  • Height:6.6"
  • Benefits: Reinforced Top Structure, Two Doors in One, Versatile Windows

Gardeners located in rainy areas should try not to choose wooden greenhouse foundations because the rainy weather can cause problems in maintaining the greenhouse as well as the foundation.

Gardeners who do not want to spend too much on the foundation can choose concrete or soil foundations. If you choose a soil foundation, you will need to be concerned about pests.

Glass Greenhouse

Choosing a greenhouse foundation for a glass greenhouse as shown should take into account the greenhouse frame and budget.

The glass greenhouse frame is heavy, so you should choose a greenhouse foundation material that can support the weight. Concrete and bricks are worth being considered.

glass greenhouse

(glass greenhouse)

Then, you should consider your planting plan afterward. If you will be planting directly in the soil inside the greenhouse, you should choose a soil foundation. Wooden slabs and other materials will not achieve the goal.

For gardeners who will grow potted plants in a glass greenhouse, wood plank foundations, concrete foundations, and bricks are all available.