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What to Grow in a Greenhouse in Summer | Greenhouse Planting Guide

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Do You know! The reason that greenhouses are very popular nowadays is NOT that this technology is advanced but because they allow you the flexibility to control the environment for your greenhouse plants and This is where the magic happens.What to Grow in a Greenhouse in Summer | Greenhouse Planting Guide

During summer the trapped sunlight will heat up your greenhouse to make it an unsuitable environment for growing plants. SO, can we grow inside a greenhouse during summer? Well! provided that you have a good ventilation system installed in your greenhouse and you are using shade cloth to block off some of the light when the temperature inside is becoming too high, you can definitely grow vegetables and plants inside your greenhouse.

In Fact, you can grow the majority of the vegetables, fruits, and herbs inside your greenhouse provided that you have a good controlled greenhouse. 

This is a guest post article written by Yasinzaii from


Vegetables to Grow in a Greenhouse in Summer

The following are the vegetables that are heat tolerant and will thrive inside a greenhouse.

Hot Peppers

Hot peppers are one the perfect veggies to grow during summer inside your greenhouse because they prefer warmer temperatures. Sow the hot pepper seeds in the seedling trays during the spring and transplant them into your greenhouse when they are 4-5 weeks old (when they reach a height of 10-12 inches). It is good to allow the soil to dry out between watering sessions.


Eggplant does well in the greenhouse during summers (especially the variety that yields long narrow fruit or larger fruit). To grow eggplants inside your greenhouse during summer, I will recommend sowing your seeds inside seedling trays during the spring and when they reach a height of 12 inches transplant them into your greenhouse. Eggplants require plenty of space so it would be great to transplant them 2 feet apart.


Okra is known in many English-speaking countries as ladies’ fingers or ochro. This veggie is native to tropical Africa and it is very tolerant of high temperatures. If you wanna utilize your greenhouse and plant okra during the summer, I will suggest sowing seeds in late spring (April) and when the seedlings are 1 month old then transplant them into your greenhouse. You should harvest them frequently when they are about 3 inches long so that they are of the best quality.


Watermelon, Cantaloupe, and honeydew do great in warm temperatures. Hence you can easily grow them inside your greenhouse during summer. You should sow the seeds inside the seedlings trays in late spring and then transplant it in your greenhouse after 4-5 weeks. I would highly recommend you to use arch trellis to save your greenhouse space if you are planning to grow melons.

Other Vegetables for Summer Greenhouse

Besides the vegetables that I have mentioned above, you can also grow vegetables like tomatoes, peppers, basil, and cucumbers because they are also heat tolerant. However, to grow these veggies you should have a good greenhouse ventilation system and you should allow partial sunlight to enter into your greenhouse in order to prevent it from overheating.

If you are looking for the Best Organic Fertilizer Plants, you will not want to miss this article, and you probably have it now at home! 

Best Greenhouse for Vegetables

You might now be thinking which greenhouse would be the best to grow veggies during summer. If you want to have a greenhouse there are two options. 

Buying Greenhouse Kit

Greenhouse kits are perfect for those people who doest have any idea on how to build one themself or they don’t have time for building a DIY Greenhouse. Such Greenhouses come as complete kits and are very easy to assemble however they are expensive.

If you want to go with a greenhouse kit, I will strongly recommend buying a good quality kit that will last for years and will be a one time expense (I know it will be expensive but it’s good to spend once rather than spending again and again). The Greenhouse kit that I will recommend is “Exaco Junior Victorian” but why?

  • 2 roof vents, One of the vents has an auto opener which opens automatically when the temperature increases.
  • 4mm thick glass provides great insulation.
  • Will last for years. 
  • Sliding frame door (Will also provide additional ventilation).
  • Finally, this one looks great.

Going for DIY Greenhouse

Greenhouse kits are usually expensive and if you are low on budget or you are just getting into this hobby then you might think of building a DIY Greenhouse. DIY greenhouses cost less compared to the kits and are used by experienced greenhouse gardeners and even beginners. Most DIY Greenhouses are polythene based and the plastic lasts for 4-5 years. After 4 to 5 years you will just have to change the plastic cover.

If you want to build a DIY Greenhouse then you can follow this detailed guide on “How to build a greenhouse” from

For your DIY greenhouse, you will be needing cool ventilation systems to grow inside your greenhouse during summer. You can follow this detailed guide  “ Build Automatic DIY Ventilation System” for making a DIY ventilation system for your greenhouse.

Best Shade Cloth for Vegetables

Besides having good ventilation the use of shade cloth is necessary for growing vegetables successfully inside your greenhouse during summer. Shade cloth comes in different shade ranges that are from 30 up to 90% and a  shade percentage of 40-50% is ideal for vegetables.

What percentage should you choose? You should choose according to your region. If the temperature is too high in your area then go with 50% shade otherwise choose 30-40%.

For 50% shade, I recommend using “EasyShade 50% Black Shade Cloth” and for the 40% shade requirement I will recommend “e.share 40% Black Shade Cloth”.

If you are still not sure which shade cloth you should choose, we did an experiment with a few types of sh