Everything You Need to Know
About
Growing Begonias

Spectacular summer-flowering tender plants loved for their vibrant colours, generous blooms and outstanding performance in containers, baskets and sheltered borders.

What We've Included:


When to Plant | Where to Plant | How to Plant | Borders | Containers & Hanging Baskets | Aftercare | Storage | Common Issues | Flowering Time | Inspiration


About Begonias

Few summer plants deliver the same combination of colour, longevity and impact as tuberous Begonias. Their large, often ruffled blooms appear in abundance throughout the warmer months, creating full and colourful displays even in smaller spaces.


Available in upright and trailing forms, Begonias offer versatility across a wide range of garden styles. Upright types provide structure and vibrant bedding displays, while trailing varieties create cascading growth ideal for hanging baskets and elevated containers.


With a long flowering season and strong visual presence, Begonias are a reliable choice for adding colour to shaded patios, courtyards and sheltered outdoor spaces.

When to Plant Begonias

Begonias need a little warmth before they begin growing, so they should be started indoors in early spring.

Plant from late February to April in frost-free conditions, as they are sensitive to cold temperatures.

They can be moved outside once all risk of frost has passed, typically from late May onwards depending on local conditions.

Where to Plant Begonias

Begonias thrive in sheltered positions with bright, indirect light or partial shade, where the compost or soil remains evenly moist without becoming waterlogged. Strong midday sun can scorch both foliage and flowers, particularly during prolonged hot weather.

Ideal locations include shaded patios, north or east-facing aspects, sheltered balconies, and covered entrances.

How to Plant Begonias

Start tubers indoors for best results and earlier flowering.


When placing tubers in trays or pots, ensure they are hollow-side up, as this is where new shoots emerge. Then lightly cover with moist, peat-free compost, leaving the crown just visible.


Keep in a warm, bright location (around 18-21°C) and water sparingly until shoots appear.


Once growth is established, pot on into larger containers or plant out after the last frost.

Borders

Although often associated with containers and baskets, Begonias can also bring impressive seasonal colour to sheltered borders where their bold flowers create a strong focal point.


Step 1: Select a warm, protected position with well-drained soil.

 

Step 2: Improve soil with organic matter before planting.

 

Step 3: Plant out after risk of frost has passed, spacing appropriately for mature growth.

 

Step 4: Water thoroughly after planting and maintain even moisture during dry periods.

 

Step 5: Provide shelter from strong winds where necessary.

 

Containers & Hanging Baskets

Begonias perform exceptionally well in containers and hanging baskets, where their flowers and trailing habit can be showcased.


Step 1: Use a free-draining, moisture-retentive peat-free compost.

 

Step 2: Plant tubers shallowly, allowing space for growth and airflow.

 

Step 3: Position in partial shade or sheltered sun.

 

Step 4: Water regularly, keeping compost evenly moist but not saturated.

 

Step 5: Feed weekly with a high-potash fertiliser once flowering begins.

 

Aftercare

Consistent care will ensure continuous flowering throughout the summer.


Step 1: Water regularly, especially in warm weather, avoiding waterlogging.

 

Step 2: Feed weekly during the growing season to support flowering.

 

Step 3: Remove spent flowers to encourage further blooms.

 

Step 4: Check for pests such as aphids and treat early if needed.

 

Step 5: Support tall or trailing growth where required.

 

 

Storage Tips

Unlike many summer plants, Begonias can reward a little extra effort by returning year after year when their tubers are lifted and protected through winter.


Step 1: Lift tubers before the first autumn frosts.

 

Step 2: Remove soil and allow tubers to dry in a cool, airy location.

 

Step 3: Cut away dead foliage and discard any damaged material.

 

Step 4: Store tubers in a dry, frost-free place in trays or paper-lined boxes.

 

Step 5: Check periodically during winter for signs of rot or shrivelling.

 

Common Issues & How to Solve Them

Rotting tubers

Usually caused by excess moisture during storage or poor drainage. Ensure tubers are fully dry before storing and use well-drained compost.


Poor flowering

Often due to low light levels or lack of feeding. Move to a brighter position and apply regular high-potash feed.


Leaf scorch

Caused by too much direct sun. Relocate to partial shade.


Aphids and pests

May affect young growth and flower buds. Remove manually or treat promptly if infestations occur.


Leggy growth

Typically caused by insufficient light. Improve positioning and encourage bushier growth through pinching if needed.


Grey mould (Botrytis)

Grey mould may develop during cool, damp weather or where plants become overcrowded. Remove affected growth and improve air circulation.

When Do Begonias Flower?

Begonias flower from early summer through to the first frosts of autumn.


Once established, they provide continuous colour from June through to October in suitable growing conditions.


Their long flowering period makes them one of the most dependable plants for summer container displays.

Find Some Inspiration For Your Garden

Begonias are ideal for adding bold seasonal colour to shaded or sheltered spaces.

Trailing varieties are perfect for hanging baskets and elevated planters, creating cascading displays that soften vertical spaces. Upright forms work well in patio containers, mixed summer bedding schemes and formal displays.

For contrast, pair Begonias with foliage plants such as Ferns or Heucheras to balance strong colour with texture. They also perform well in coordinated colour themes for patios and entrances.

Their adaptability makes them especially useful for brightening shaded areas where many flowering plants struggle.

Ready to Shop for Begonias?

Whether you're creating a cascading hanging basket, a colourful patio display or a sheltered border packed with summer colour, there's a Begonia type to suit your space. Trailing varieties bring movement and softness to elevated containers, while upright forms create bold displays where their large blooms can be appreciated up close.


With the right conditions and a little winter protection, Begonias reward gardeners with months of colour and can be enjoyed season after season.

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