Flowers in a Greenhouse

How to Grow Flowers in a Greenhouse

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Growing flowers in a greenhouse is a wonderful way to enjoy beautiful blooms all year round. Whether you are a beginner or an experienced gardener, having a greenhouse can extend your growing season and protect your plants from harsh weather conditions. In this article, we’ll explain how to grow flowers in a greenhouse, providing detailed instructions and tips to help you succeed.

Growing Flowers in a Greenhouse

Choosing the Right Greenhouse

First, choose the right greenhouse for your needs. There are many types of greenhouses, including freestanding and attached structures, as well as different materials such as glass, polycarbonate, and polyethene. Consider the size of your garden and the types of flowers you want to grow. A larger greenhouse will give you more space for a variety of plants, while a smaller one is easier to manage and maintain.

Flowers in a Greenhouse
Flowers in a Greenhouse

Setting Up Your Greenhouse

Once you have chosen your greenhouse, it’s time to set it up. Start by selecting a location that receives plenty of sunlight, ideally at least six hours a day. Ensure the site has good drainage to prevent water from pooling around the base of the greenhouse. Next, prepare the foundation. A solid base, such as concrete or gravel, will provide stability and prevent weeds from growing inside.

Controlling Temperature and Humidity

Temperature and humidity control are crucial for growing flowers in a greenhouse. Install a thermometer and hygrometer to monitor these conditions. Most flowers thrive in temperatures between 65-75°F during the day and slightly cooler at night. Use heaters, fans, and vents to regulate the temperature. Additionally, maintain humidity levels between 50-70% to prevent diseases and promote healthy growth. Misting systems and humidifiers can help increase humidity, while ventilation can reduce excess moisture.

Choosing the Right Flowers

Selecting the right flowers to grow in your greenhouse is important. Consider the climate and growing conditions in your area. Some popular greenhouse flowers include orchids, begonias, geraniums, and African violets. Research the specific needs of each flower type, including light, temperature, and watering requirements, to ensure they thrive in your greenhouse environment.

Preparing the Soil

Good soil is essential for growing healthy flowers in a greenhouse. Use a high-quality potting mix that provides good drainage and aeration. You can also create your mix by combining equal parts of peat moss, perlite, and compost. Before planting, sterilize the soil to eliminate pests and diseases. You can do this by heating it in an oven at 180°F for 30 minutes or using a steam sterilizer.

Planting Your Flowers

Now that your greenhouse is ready, it’s time to plant your flowers. Start by filling pots or trays with the prepared soil mix. Plant seeds or seedlings according to the depth and spacing recommendations for each flower type. Water the plants thoroughly after planting and place them in a location that receives the appropriate amount of light.

Watering and Feeding

Proper watering and feeding are crucial for growing flowers in a greenhouse. Water the plants regularly, keeping the soil moist but not soggy. Overwatering can lead to root rot, while underwatering can cause wilting. Use a watering can with a fine rose to avoid damaging delicate flowers. Fertilize your plants every two weeks with a balanced, water-soluble fertilizer. Follow the instructions on the fertilizer package for the correct dilution and application rates.

Pest and Disease Management

Pests and diseases can be a challenge when growing flowers in a greenhouse. Regularly inspect your plants for signs of pests, such as aphids, spider mites, and whiteflies. Use insecticidal soap or neem oil to control infestations. Additionally, keep an eye out for diseases like powdery mildew and botrytis. Remove affected leaves and treat them with appropriate fungicides. Maintaining proper temperature, humidity, and ventilation will also help prevent pest and disease problems.

Pruning and Deadheading

Pruning and deadheading are important tasks for keeping your flowers healthy and promoting continuous blooms. Regularly remove dead or yellowing leaves to prevent disease and improve air circulation. Deadhead spent flowers to encourage new growth and extend the blooming period. Use clean, sharp scissors or pruners to make clean cuts and avoid damaging the plants.

Monitoring Growth and Adjusting Care

Monitor the growth of your flowers and adjust care as needed. If you notice that plants are not growing as expected or showing signs of stress, reassess the conditions in your greenhouse. Ensure that temperature, humidity, light, and watering are all within the optimal range for your specific flowers. Make necessary adjustments to improve the growing environment and support healthy plant development.


Growing flowers in a greenhouse allows you to enjoy beautiful blooms all year long. By choosing the right greenhouse, controlling temperature and humidity, selecting appropriate flowers, and providing proper care, you can create a thriving garden. Regular monitoring and adjustments will ensure your flowers remain healthy and vibrant. With these tips, you’ll be well on your way to successfully growing flowers in a greenhouse.

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