How to Plant Begonias

Originating from subtropical and tropical climates, begonias are the perfect plant for a long-lasting display of showy, exotic flowers. With spring planting season coming up, discover the best times for planting begonias, as well as our top tips on how to plant them in beds, baskets and pots.

When to plant tubers

A tuber is an enlarged storage organ that grows beneath the soil surface. They are super easy to plant and easy to care for. Start growing begonia tubers in early spring, between March and April.

When to plant begonia plants

Plant begonia plug plants outdoors in late spring after the soil has warmed up and all danger of frost has passed.

How to plant begonias in beds and borders

For tubers:

  • Plant tubers 5-7.5cm (2-3in) deep in fertile well-drained soil and in a sunny, sheltered position.
  • Space tubers 2cm (¾in) apart and 2.5cm (1in) deep.
  • As a general rule, plant out in the garden once danger of frost has passed.

For plugs:

  • Plug plants require potting and growing on for a month or so if you want filler plants for beds and containers.
  • Pot on into larger pots as soon as possible.
  • Place them in a well lit, ventilated and reasonably warm such as a greenhouse or windowsill to grow on.
  • Once the plants have rooted into the compost, and the risk of frost has passed, your plugs are ready for planting out in the garden.
  • Simply dig a whole wide enough to hold the plug plant, place the plant inside the hole and cover the edges with soil.
  • Finally, gently firm the plug into the hole and water.

How to plant begonias in baskets & pots

For tubers:

  • Fill the pot or basket with a moist sandy potting compost about 2 inches (5cm) from the top.
  • Place the tuber rounded side down and gently push into the compost, fill the pot to the rim with compost and water in.
  • Try planting three 5/6cm tubers into an average hanging basket or 5 tubers in a 30cm container.

For plugs:

  • Pot plugs on into larger pots as soon as possible.
  • Place them in a well lit, ventilated and reasonably warm such as a greenhouse or windowsill to grow on.
  • When they have grown sufficiently, they will need to be transplanted into pots and slowly hardened off before planting into hanging baskets and pots outside.
  • A rough guide is one plant per inch of hanging basket diameter. This would mean you would need 12 plants to a 12” or 30 cm hanging basket.
  • A 12” pot or patio container will look well filled with 8 rather than 12 plants.

Check out some of our other blogs:

When to Plant Begonias

Begonias are a summer staple, bringing a plethora of colourful flowers to the garden all season long. Their bright blooms and easy to grow nature is exactly why the species is so beloved by gardener’s across the country.

However, knowing when, how, or where to plant Begonias can be a confusing task – especially for those new to gardening! Follow our guide to effortlessly grow your Begonias for the summer season.

When to Plant

Plant Begonias in early spring, once the threat of frosts has disappeared. Begonias aren’t a hardy plant, and can be damaged by cold weather.


More specifically, March and April are the best months to plant your Begonias, as there is less chance of frosts to appear.

How to Plant

Planting Begonias is an easy enough task. Most Begonias are supplied in a tuberous form, which are similar to bulbs in the way that they should be planted.


Plant your tubers in seed trays in March or April. Fill trays with moist potting compost, and place the tuber inside around 3cm deep and spaced apart 3cm. Once sprouting leaves, move into individual pots and harden off when all danger of frost has passed.

Where to Plant

Begonias can provide masses of blooms around the garden, regardless of where planted. They prefer sunny conditions, so take this into account when finding the perfect spot.


It’s helpful to note that Begonias don’t like overly-damp conditions, and will rot if kept too moist. Whether you plant them in hanging baskets, patio pots, or simply in the border, your Begonias will thrive.

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