April's Greenhouse Gardening: Best Plants to Grow

April is an exciting month for greenhouse gardeners, as it signals the start of the planting season. With longer days and warmer temperatures, a wide range of plants can be sown and transplanted. But with so many options, you might be wondering, "What should I plant in my greenhouse in April?" Let's delve into the world of greenhouse gardening and explore the best plants to cultivate this month.

Before we dive into the specific plants, it's essential to understand your greenhouse's environment. The ideal temperature for most plants in April is between 65-75°F (18-24°C) during the day and a drop of about 10°F (5.5°C) at night. Maintaining this temperature range will promote healthy growth and prevent any setbacks.

Vegetables

April is the perfect time to start sowing a variety of vegetables in your greenhouse. The longer days and warmer temperatures create an ideal environment for these plants to germinate and grow.

Vegetables not only provide fresh produce for your table but also add a vibrant, lush touch to your greenhouse. Plus, they're easy to care for and can be grown in a variety of containers or directly in the greenhouse soil.

Warm-season Vegetables

Warm-season vegetables thrive in the higher temperatures of April and are best sown directly into the greenhouse soil or in seed trays. Some popular warm-season vegetables to consider include:

• Tomatoes: Start seeds indoors in early April and transplant them into the greenhouse soil later in the month. Choose varieties that suit your climate and space, such as determinate or indeterminate types.
• Peppers: Sow seeds indoors in early April and transplant them into the greenhouse once the risk of frost has passed. Both sweet and hot peppers can be grown successfully in a greenhouse environment.
• Cucumbers: Sow seeds directly into the greenhouse soil in late April. Choose bush or trailing varieties depending on the space available in your greenhouse.
• Zucchini: Sow seeds indoors in early April and transplant them into the greenhouse once the soil has warmed up. Zucchini plants are prolific and can produce an abundance of fruit in a greenhouse setting.

Cool-season Vegetables

While April is typically associated with warm-season vegetables, you can still grow cool-season vegetables in your greenhouse. These plants prefer cooler temperatures and can be sown directly into the greenhouse soil or in seed trays.

• Lettuce: Sow seeds indoors in early April and transplant them into the greenhouse once the seedlings have developed their first set of true leaves. Choose heat-tolerant varieties for better performance in the greenhouse.
• Spinach: Sow seeds directly into the greenhouse soil in early April. Spinach is a cool-season crop that prefers temperatures between 50-65°F (10-18°C).
• Radishes: Sow seeds directly into the greenhouse soil in early April. Radishes are fast-growing and can be harvested within 20-30 days, making them an excellent choice for succession planting.

Flowers

April is also an ideal time to start growing flowers in your greenhouse. Flowers not only add beauty to your greenhouse but also attract beneficial insects and pollinators. Plus, many flowers can be grown from seed, making them an affordable option for your greenhouse garden.

When choosing flowers for your greenhouse, consider their light requirements, as greenhouse environments can be more intense than outdoor conditions. Opt for flowers that thrive in partial shade or full sun, depending on your greenhouse's orientation and lighting.

Annual Flowers

Annual flowers complete their life cycle in one growing season and are typically grown from seed. Some popular annual flowers to consider for your greenhouse include:

• Marigolds: Sow seeds indoors in early April and transplant them into the greenhouse once the seedlings have developed their first set of true leaves. Marigolds are heat-tolerant and can thrive in the warmer temperatures of the greenhouse.
• Nasturtiums: Sow seeds directly into the greenhouse soil in late April. Nasturtiums are easy to grow and can tolerate a wide range of temperatures, making them an excellent choice for greenhouse gardening.
• Petunias: Sow seeds indoors in early April and transplant them into the greenhouse once the seedlings have developed their first set of true leaves. Petunias come in a variety of colors and can be grown in hanging baskets or in the greenhouse soil.

Perennial Flowers

Perennial flowers live for more than two growing seasons and can provide year-round color in your greenhouse. While many perennials are best planted as established plants, some can be grown from seed in the greenhouse. Consider these popular perennial flowers for your greenhouse:

• Impatiens: Sow seeds indoors in early April and transplant them into the greenhouse once the seedlings have developed their first set of true leaves. Impatiens are shade-loving plants that can thrive in the partial shade of a greenhouse.
• Begonias: Sow seeds indoors in early April and transplant them into the greenhouse once the seedlings have developed their first set of true leaves. Begonias come in a variety of colors and can be grown in hanging baskets or in the greenhouse soil.

As you plan your greenhouse garden for April, remember that the key to successful greenhouse gardening is to provide the right environment for your plants. Monitor the temperature, humidity, and light levels in your greenhouse, and adjust as needed to create the ideal growing conditions for your plants. With the right care and attention, your greenhouse can become a lush, productive oasis filled with an abundance of vegetables, flowers, and other plants.