Simple Tips to Grow a Garden in Greenhouse

Do gardening using greenhouse techniques and grow vegetables and flowers in an environment-friendly way.

Have you ever enjoyed your annuals in the summer time, but then were sad when the freezing temperatures of October and November killed those plants? Perhaps you had a beautiful large coleus one year and left it outside during the winter and could never find that variety again.

Others may like to have fresh summer vegetables in the winter time. Whatever the reason, many of you would like to have a greenhouse to grow a garden in the winter.

Do you need to grow flowers and vegetable greenhouse?

 GreenhouseTo build a greenhouse and grow vegetables and flowers in an environment-friendly way you need.

1. Greenhouse kits are great for the beginner. There are many greenhouse kits available which you can get from some of the bigger garden centers or off of the internet. These centers offer a whole array of greenhouse kits and materials to build your own greenhouse from scratch.

Depending on how many plants you want to grow, you need to choose a greenhouse kit. If you are only beginning, you should probably consider buying a smaller greenhouse that will consume less energy and warm up faster.

2. A heater: is required for people further north and in cold climates. This is especially the case if you want to propagate annuals or grow tomatoes during the winter time. Annuals and tomatoes cannot handle freezing temperatures, so if you want to successfully propagate annuals such as inpatient and coleus, you should have the temperature in your greenhouse set at about 60 degrees Fahrenheit. Most greenhouse heaters of good quality come with thermostatic control.

3. Growth lamps: might be necessary in more northern regions of the world to successfully grow and propagate some annuals which are of tropical or subtropical origin. They are required because, during wintertime, the days are much shorter than closer to the equator.

Furthermore, in many northern regions, the majority of days are overcast, severely limiting the sun’s light from feeding your plants. This is where the growth lamps can come in handy. Growth lamps should be suspended from the ceiling.

4. Solar heat-trapping glass: or plastic is a must for building a greenhouse from scratch. Greenhouses keep a good percentage of their heat by the sun. The greenhouse materials let the sun’s heat come in but do not let it out.

Setting the temperature of your greenhouse

Depending on the time of year, the temperature of your greenhouse should be regulated accordingly by the three seasons excluding summer.

1. Fall is a time of year where some days towards the beginning of the season can be rather warm and summer like whereas other days can be cold. Fall is usually the time of year when the first frost and freezing temperatures arrive in the northern climates.

Unless you get into late fall such as the end of October into November when winter begins to set in, you should not turn on the heater. In the fall up to mid-October, the sun is still rather strong. Furthermore, bugs and other garden pests have a natural instinct to go where it is warmer in the fall.

For example, Chinese beetles, which are orange ladybugs congregate around your windows and screen doors when it is warm in late September or early October. They do this because they know that in your home the heat will be running and it will be decidedly warmer than the freezing temperatures of the coming winter.

Though Chinese beetles are not a problem for your plants, but other bugs, such as aphids and other beetles can be devastating in your greenhouse if they come in and survive the winter. During the early fall and during Indian summers, have netting on all the open windows to keep the bugs from coming in and have the windows open to keep the temperature in the greenhouse the same as outside.

Only when it is cold outside and freezes during the night time, have the windows closed and allow the sun’s heat to warm the greenhouse. Even though it may freeze in October, the frosts are usually during the night and fade away as the morning sun comes up.

Though the fall sees hard freezes, if your greenhouse is closed up at night and the windows are open on warm days, it will not be freezing cold inside the greenhouse. This is because the glass or plastic panels of your greenhouse are designed to let the sun’s heat come in, but not let it go out.

2. Winter is the season that is the toughest on your plants. As winter weather sets in mid to late November, the heater in your greenhouse should be turned on. Never let your greenhouse get any hotter than 95 degrees Fahrenheit. High temperatures can be damaging to tomatoes and peppers.

Furthermore, in the cold dark days of winter, from late November to March, you should have the growth lamps on. In this time of year, try to simulate the same kind of conditions during the summer months. Your plants will be much healthier and more beautiful by spring.

3. Spring is the time of year where the days get much longer and the temperature slowly gets warmer. This is a time of year that sees some freezing temperatures and warmer days. The sun also becomes stronger in spring and this is a time to slowly acclimate the plants to be outside for the summer.

Do not put your annuals out early. Do not plant any of your newly propagated annuals until after Memorial Day, unless you live in USDA zone 6a or warmer. Zone 6a covers Tennessee, Kentucky, North Carolina, Virginia, Arkansas, northern Texas, etc. In those areas, it gets warmer and the likelihood of late hard frosts is lesser than in the more northern states or Canada.

Sprinkler systems for your greenhouse

Every greenhouse should have its own sprinkler system. Like when outside, the plants in the greenhouse also need water. Technically, in most professional greenhouses, the sprinkler system works by a hose that is suspended from the ceiling and has shower heads that rain off the plants, like a light summer rain. You should have the same type of watering system. Furthermore, your watering system should be set on a timer to rain on your plants every two or three days.

Potting and drainage

Plants should be potted in pots that have drain holes and the water should be drained away from the plant. Make sure that the soil drains well and the plants only get the water they need, otherwise, the roots can drown and that can kill the plant.

Having a greenhouse can be fun for the whole family. You can use your greenhouse to grow good organic vegetables and not have to worry about buying GMO vegetables from the grocery store.

Also, you can use your greenhouse to propagate your favorite annuals. Many coleuses can grow big and tall. Some of these coleus planted in large pots can be a great focal point for your summer garden.

If your greenhouse is big, you can also make it an indoor garden if you choose to. You can have the greenhouse set up so that the plants can be arranged in beautiful groups and have a sitting area in the middle.

You need to remember, In many regions in the northern United States and Canada, the cold winter winds come from the North. How the north wall of your greenhouse is insulated is critical to be able to successfully raise your plants during the winter.


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