How to Care for Begonias in Full Sun

Begonias Full Sun: Why It Matters

When it comes to growing begonias, one of the most important factors to consider is the amount of sunlight they receive. While some varieties prefer partial shade or filtered light, others thrive in full sun. If you're looking to grow begonias in a sunny spot, it's essential to understand their requirements and how to care for them properly.

Understanding Begonia Varieties

Cane-Like Begonias

Cane-like begonias are known for their tall, upright stems and large, showy flowers. They prefer full sun and well-draining soil, but can also grow in partial shade. To keep cane-like begonias healthy in full sun, make sure to water them regularly and provide them with fertilizer every few weeks during the growing season.

Tuberous Begonias

Tuberous begonias are another type of begonia that does well in full sun. They produce big, bold blooms and come in a range of colors. These begonias prefer rich, well-draining soil and regular watering, especially during hot weather. You can also feed tuberous begonias with fertilizer every two to three weeks to encourage healthy growth.

Choosing the Right Location

If you're planning to grow begonias in full sun, it's important to choose the right location. Look for a spot that receives at least six hours of direct sunlight each day, preferably in the morning or late afternoon when the sun is less intense. Avoid planting begonias in areas that get too hot, such as south-facing walls or concrete patios, as this can cause the soil to dry out quickly and stress the plants.

Preparing the Soil

Begonias prefer well-draining soil that's rich in organic matter. Before planting, amend your soil with compost or peat moss to improve drainage and add nutrients. You can also mix in perlite or sand to help the soil drain more quickly. If you're planting begonias in a container, make sure it has adequate drainage holes and use a high-quality potting mix designed for flowering plants.

Watering Begonias in Full Sun

How Often to Water

In full sun, begonias require more frequent watering than they do in partial shade. Aim to keep the soil evenly moist, but not waterlogged, by watering once or twice a week, depending on the temperature and humidity. Check the soil regularly by sticking your finger about an inch deep into the soil. If it feels dry, it's time to water.

How to Water

To water begonias in full sun, use a watering can or hose with a gentle nozzle to avoid damaging the delicate flowers and foliage. Water at the base of the plant, not over the top, to prevent fungal diseases from developing. Avoid wetting the leaves, as this can also lead to disease problems.

Fertilizing Begonias in Full Sun

When to Fertilize

Begonias benefit from regular fertilization during the growing season, especially when grown in full sun. Feed your plants every two to three weeks with a balanced fertilizer that's high in phosphorus to encourage flowering. Stop fertilizing in late summer or early fall to allow the plants to enter dormancy.

How to Fertilize

To fertilize begonias, apply a water-soluble fertilizer according to the package instructions. Mix the fertilizer into a watering can and apply it to the soil around the base of the plant. Avoid getting fertilizer on the leaves or flowers, as this can cause burning or other damage.

Pest and Disease Control

Common Pests

• Aphids
• Spider mites
• Thrips

To control these pests, use an insecticidal soap or neem oil spray. Apply according to the package instructions, and repeat every few weeks as needed.

Common Diseases

• Fungal leaf spot
• Botrytis blight
• Crown rot

To prevent these diseases, avoid wetting the leaves when watering and make sure the soil has good drainage. If you notice signs of disease, such as yellowing or browning leaves, remove affected plant parts and treat with a fungicide if necessary.

Overwintering Begonias

If you live in a colder climate, you may need to overwinter your begonias indoors. To do this, dig up the tubers or cuttings and store them in a cool, dark, dry place for the winter. Alternatively, you can grow begonias as annuals and replace them each year.

Growing begonias in full sun is a rewarding experience that can produce beautiful, showy blooms. By understanding the different varieties of begonias, choosing the right location, preparing the soil, and providing proper care, you can enjoy these stunning plants all season long.

FAQs

1. Can I grow begonias in full sun?

Yes, some types of begonias do well in full sun, such as cane-like and tuberous begonias.

2. How often should I water begonias in full sun?

Water begonias in full sun once or twice a week, depending on the temperature and humidity.

3. What kind of fertilizer should I use for begonias in full sun?

Use a balanced fertilizer that's high in phosphorus to encourage flowering.

4. What are common pests and diseases that affect begonias?

Common pests include aphids, spider mites, and thrips, while common diseases include fungal leaf spot, botrytis blight, and crown rot.

5. How do I overwinter begonias?

You can dig up the tubers or cuttings and store them in a cool, dark, dry place for the winter or grow begonias as annuals and replace them each year.