Can Begonias Grow in Full Sun?

Begonias are stunning plants known for their colorful, abundant blooms and attractive foliage. While they have a reputation as shade-lovers, modern begonia breeding has produced quite a few varieties that not only tolerate full sun but thrive in it.

Begonia Sun Requirements Vary by Type

There are over 1,000 different species of begonia, and their light requirements can vary greatly. Traditional wax begonias rhizomatous begonias, and tuberous begonias generally need shade to part shade. However, certain types like dragon wing begonias, Bonfire begonias Big begonias, and nonstop begonias can flourish in full sun.

Some key factors that determine how much sun a begonia can take include

• Foliage color – Dark leaf varieties withstand more light than green leaf types. The darker pigmentation protects the leaf cells from sun damage.

• Bloom size – Larger-flowered begonias need more shade while small-flowered types can grow in full sun.

• Genetics – Through breeding, some begonia hybrids inherit genes for sun tolerance and heat resistance.

• Climate – Begonias can take more sun in cooler climates. In hot climates afternoon shade is essential.

So begonias can grow in full sun, but only certain varieties have that ability. Check the tag or plant description to make sure a begonia is labeled as sun-tolerant before planting it in an unshaded spot.

Best Begonias for Full Sun

Some of the top begonias that can flourish in full sunlight include:

Dragon Wing Begonias

Dragon wing begonias thrive in full sun with some afternoon shade in hot climates. Their glossy, colorful foliage provides great ornamental value even when not in bloom. The large, dangling flower clusters add long-lasting color through the season without deadheading. Dragon wings grow 18-24 inches tall and wide, making them excellent choices for landscapes and large containers.

Big Begonias

Big series begonias like Big Red with Green Leaf can take full sun while growing up to 2 feet tall. They make a big impact in borders with their enormous blossoms in shades of pink, red, white, orange, yellow, or multicolors. Big begonias bloom continuously without deadheading. They’re also versatile growers for partial shade areas.

Bonfire Begonias

Bonfire begonias withstand full sun with their lush, deeply lobed foliage colored in olive green, bronze, or burgundy. Profuse flowers in shades of orange, red, yellow, or pink bloom heavily in summer and fall. Growing 12-18 inches tall and wide, Bonfire begonias are ideal for containers and hanging baskets.

Nonstop Begonias

Nonstop tuberous begonias will flower abundantly all summer in sun or light shade. Their rose-like double blooms come in numerous colors including yellow, orange, pink, red, and white. Nonstop begonias grow in hanging baskets, window boxes, patio pots, and garden beds. At just 10-12 inches tall, they work well along borders and walkways.

Rex Begonias

While Rex begonias need shade as garden plants, their showy ornamental leaves make them excellent houseplants for bright rooms and full sun exposure indoors. The colorful foliage patterns and textures of Rex begonias add interest that doesn’t depend on flowers. Growing Rex begonias in 4-6 hours of direct sun will keep their leaves vivid.

Growing Begonias in Full Sun

When growing sun-loving begonias, give them these conditions for the best performance:

• Rich, fertile soil – Improve drainage in heavy clay soils by mixing in compost or peat moss. Begonias thrive in organically-enriched, loamy soil.

• Afternoon shade – In hot climates, provide shade in the hottest part of the day to prevent leaf scorch. Dappled shade under taller plants is ideal.

• Consistent watering – Let the soil dry out slightly between waterings. Take care not to overwater.

• Shelter from wind – Protect begonias from hot, drying winds which can desiccate leaves.

• Air circulation – Allow for air movement to prevent disease, but don’t place begonias in very exposed sites.

• High quality containers – Use containers with drainage holes. Avoid unglazed clay pots that dry out rapidly.

• Fertilizer – Apply balanced fertilizer monthly. Potted begonias benefit from slow-release granular fertilizer.

Signs of Too Much Sun on Begonias

Begonias receiving too much light show symptoms like:

• Wilting or drooping leaves
• Leaves scorching or turning brown on the edges
• Bleached color in the foliage
• Sparse flowering
• Stunted growth

If your begonias display any of these signs, try filtered shade, light shade from nearby plants, or afternoon shade to remedy the issue.

For begonias in too much sun, you can also improve the growing conditions by:

• Moving plants to a site with afternoon shade
• Applying mulch to cool the soil and roots
• Watering more frequently to replenish moisture
• Mist-spraying plants on hot afternoons
• Applying shade cloth over plants

With some adjustments to care, you can help sun-stressed begonias recover and continue growing strong.

Key Takeaways on Full Sun Begonias

• While many begonias need shade, certain varieties can flourish in full sunlight. Seek out sun-loving types.

• Allow begonias to become slightly dry between waterings. Don’t overwater.

• In hot climates, provide midday shade for begonias in full sun.

• Look for foliage or flower burn and wilting to determine if begonias are getting too much light.

• Improve hot site conditions by adding shade, increasing water, and cutting wind exposure.

With the right variety, site conditions, and care, begonias can grow successfully in full sun for seasons of vivid flowers and foliage. Seek out sun-tolerant types and adjust their growing conditions as needed.