Complete Guide: How To Plant Begonia Tubers

There’s no denying that Begonias are one of the most popular and sought after flowers for the summer garden. With a beautiful and rich assortment of colours and a long flowering season, there are so many qualities to enjoy when it comes to these vibrant beauties.

Check out our guide to find out more about tubers and how to plant them, as well as a summary of our beautiful types of Begonias, so you can find a variety that best suits you and your garden’s needs.

What are Tubers?

Tubers are a thick underground part of a stem or rhizome and Begonia sizes are measured by the diameter of the tuber. Many of our varieties are supplied either as:

  • Standard size (3/4cm) – great for mass planting
  • Exhibition size (5cm+) – excellent for large flowering displays

How Do I Plant Begonia Tubers?

  • Planting Time: February – May 📆
  • Position: Full Sun/Partial Shade ☀
  • Flowering Time: June-October 🌸
  1. Start off your Begonias indoors (until all risk of frosts have passed) in a light room or greenhouse.
  2. Plant the tubers in pots with the hollow side facing up.
  3. Cover the tubers with no more than 1cm of soil or potting compost.
  4. Watered regularly during the summer, so that the soil is not allowed to dry out.
  5. Feed once every two weeks with a high potassium up until the blooms begin to fade.
  6. Lift tubers after flowering has finished and the leaves have begun to turn yellow.
  7. Store in a dry, cool (but frost-free) location over the winter. Store in soil that is only a little moist and keep this a little moist over the winter (with irregular watering) to keep the tubers from drying out.

Check out our video tutorials

How to Plant Cascading Begonias
How to Plant Cascading Begonias
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Begonia Types

Which tuber suits you? To help you get a head start on your summer planning, we’ve listed out the different types of Begonias, so you can decide which magnificent bloomer will best suit your garden.

Double Flowering
A British favourite. Their ruffled, double flower heads bloom in an array of bright colours. Perfect for summer borders and pots.

Create a waterfall of elegance with these beautiful, trailing Begonias. Perfect for hanging baskets and patio pots.

As the name suggests, these beautiful Begonias will produce masses of flowers all throughout the summer months. Great for summer baskets, pots or beds.

Superba (Mighty Mini) Our premium Superba (Mighty Mini) Begonias are a stand out for the summer garden. This colourful, compact and versatile plant is perfect for pots, hanging baskets or window boxes.

Fancy Frills (Fimbriata)
A remarkable, flamboyant Begonia. Add charm to your summer patios with these large, frilly blooms. Available in an assortment of magnificent colours.

10 thoughts on “Complete Guide: How To Plant Begonia Tubers”

  1. I found your guide on growing Begonias very helpful, however you did not mention the maggot that burrows into the corm after
    flowering and can destroy the corm, I regularly inspect my corms for this nasty little maggot.

    1. Thanks for the tip Christine! Checking the corms in that way is an excellent habit, and we’re really glad you found the guide helpful. Thanks again for sharing!

  2. Last year I bought Begonia Glowing Embers from you and emailed you asking how to overwinter them. I received no reply. I have bought some again this year and am hoping for a reply this time! PLEASE.

    1. Thanks for getting in touch Clare! Not sure where you asked your query but very sorry to hear you received no reply. To over winter you tubers, all you need to do is start by digging up the tubers once they have died back as we get into the winter months. This can be late autumn, before the frost. The next step is to dry them out with some newspaper for about a week or until the tubers are completely dry – sunlight helps but stick to cool/mild areas. When you are happy that they’ve dried out, you can cut back any foliage or soil that remains and store away in individual paper bags, or spread across newspaper. You can keep these in an ordinary cardboard box, somewhere cool and dry throughout the winter free from damp. Another good tip is to dust them with sulpher powder prior to storing them, as this can help prevent mildew. Hope that helps!

    1. Thanks so much for your order! Tubers at this time of year are sent out within 28 days, as the weather starts to get milder for them. But if you’re still waiting after that time or would just like an update on your order, please don’t hesitate to get in touch with us at – thanks again!

  3. I bought a number of the large flowered begonias last year and the results, following Jeff’s guide were amazing. We were amazed at the value and huge non stop flowers that lasted through to autumn. I am ready to start again this year and looking forward to more super blooms. My tip for growers in northern parts is start in March unless you can keep the growing plants indoors from frost……..

    1. Great tip Phil, thanks for sharing! Fantastic to hear about your success with the tubers, glad Jeff’s wisdom came in handy. Thanks again!

  4. Begonia corms only just arrived. Is it too late to plant for this year? If so can I save them till next spring?

  5. An impressive share, I just given this onto a colleague who was doing a little analysis on this. And he in fact bought me breakfast because I found it for him.. smile. So let me reword that: Thnx for the treat! But yeah Thnkx for spending the time to discuss this, I feel strongly about it and love reading more on this topic. If possible, as you become expertise, would you mind updating your blog with more details? It is highly helpful for me. Big thumb up for this blog post!

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