Picotee begonias are celebrated for their distinctively colored petal edges, creating a visually appealing ribbon effect. These tuberous begonias offer large, showy flowers, often reaching up to 6 inches across, with deep green leaves that highlight the vibrant blooms. Their unique aesthetic makes them a favored selection for adding visual interest to outdoor spaces. They are popular choices for borders, flower beds, pots, and hanging baskets.
Optimal Growing Conditions
Light
Picotee begonias thrive in partial shade or filtered light. Direct, intense afternoon sun can scorch their delicate leaves and fade petal colors, particularly in warmer climates. An ideal placement involves morning sun followed by afternoon shade, ensuring they receive adequate light without excessive heat exposure.
Watering
Consistent moisture is important for picotee begonias, but the soil should never become waterlogged to prevent root rot. Water the plant thoroughly when the top inch of soil feels dry to the touch. Watering at the base of the plant helps reduce the risk of fungal diseases on the foliage. Allowing the soil to dry slightly between waterings prevents overly moist conditions.
Soil
Well-draining soil rich in organic matter is preferred for picotee begonias. A slightly acidic to neutral pH is suitable for their growth. Incorporating amendments like compost or finely ground bark can improve drainage and aeration, which are important for healthy root development. Potting mixes formulated for African violets are often a convenient and suitable option due to their composition.
Temperature and Humidity
Picotee begonias flourish in warm, humid conditions, with an optimal temperature range between 65 to 70 degrees Fahrenheit. Temperatures below 55 degrees Fahrenheit can be detrimental to their health. To increase humidity, especially in dry indoor environments, place the plant on a pebble tray filled with water or use a room humidifier. Protecting begonias from strong winds is also advisable, as their flowers and foliage can be fragile.
Fertilization
During their active growing season, from spring through fall, picotee begonias benefit from regular feeding. A balanced, water-soluble fertilizer applied every two to four weeks supports vigorous growth and abundant blooms. Alternatively, a slow-release granular fertilizer can be incorporated at the time of planting. Always dilute liquid fertilizers to half strength to prevent nutrient burn.
Ongoing Maintenance
Pruning
Pruning picotee begonias helps encourage bushier growth and maintain an attractive plant shape. Pinching back stem tips can promote branching and a more compact form. Removing spent blooms, a process known as deadheading, redirects the plant’s energy from seed production to developing more flowers. This practice also involves removing any yellowing or dead leaves to improve air circulation and overall plant health.
Repotting
Picotee begonias may require repotting every one to two years, particularly if they have outgrown their current container. Signs that repotting is needed include roots circling the drainage holes or the plant becoming top-heavy. The best time to repot is in early spring before new growth fully emerges. When repotting, choose a container only one or two inches larger in diameter to avoid excessive soil moisture retention, which can lead to issues.
Protecting Your Begonia
Pest and Disease Management
Picotee begonias can occasionally encounter pests such as spider mites and mealybugs. Regularly inspecting the undersides of leaves helps in early detection. Fungal diseases like powdery mildew, appearing as white dust on leaves, and Botrytis blight, a gray fuzzy mold, can occur, especially in overly moist conditions. Ensuring good air circulation and avoiding overhead watering helps prevent these issues. If problems arise, horticultural oil or insecticidal soap can manage pests, while improved air circulation and reduced humidity can mitigate fungal diseases.
Addressing Common Leaf Issues
Leaf discoloration in picotee begonias often indicates environmental stress rather than pests or diseases. Yellowing leaves can signal overwatering or insufficient drainage, leading to root problems. Brown, crispy leaf edges often point to underwatering or low humidity, while brown spots can result from direct sun exposure or water splashing on foliage. Adjusting watering practices, improving humidity, and ensuring proper light exposure can resolve these issues.