Mature size & growth rate

How big does Begonia 'Pin Up Flame' (Begonia × tuberhybrida 'Pin Up Flame') get?

Also called pin up flame begonia, bicolor tuberous begonia.

More about begonia 'pin up flame'

About Begonia 'Pin Up Flame'

Begonia × tuberhybrida 'Pin Up Flame' · also called pin up flame begonia, bicolor tuberous begonia · flowering

Begonia 'Pin Up Flame' is a tuberous begonia with large single flowers in creamy yellow boldly edged in fiery orange-red, an eye-catching bicolour that holds an RHS Award of Garden Merit. Grown as a half-hardy annual or lifted tuber, it flowers all summer in partial shade in moist, free-draining soil and is stored dry over winter.

Mature size: Around 25-35 cm tall and wide.

Watch for — Tuber rot: Wet compost in growth or damp storage rots the tuber. Use free-draining compost and overwinter dry tubers somewhere cool and frost-free.

Indoor size vs how big it gets in the wild

Begonia 'Pin Up Flame' reaches its full size within one growing season — there is no "long-term" size, just how big it gets before you harvest or it dies back. Indoors and in a pot, expect around 25-35 cm tall and wide.. A pot, your light levels and a little pruning are what set the final size in a home, far more than the plant's theoretical potential.

It sizes up fast and once, racing from seedling to full size in a single season; after cropping it is finished, so size is a within-season question.

Growth rate and years to mature

Begonia 'Pin Up Flame' is a moderate grower. Realistically, expect a single growing season — it reaches full size in one year, then is done. Its feeding profile backs this up: feed every 1-2 weeks in summer with a high-potash liquid feed such as a tomato fertiliser to keep the bicolour flowers coming. use balanced feed early in the season and switch to high-potash as buds form; stop feeding as growth dies back.

Want this turned into the right next pot at the right moment? The pot size calculator and the begonia 'pin up flame' repotting guide cover when and how much to size up — pot size is one of the biggest levers on how fast begonia 'pin up flame' grows.

How to keep begonia 'pin up flame' smaller

You are not stuck with the maximum size. For begonia 'pin up flame' specifically, these are the levers, in order of impact:

Choose a compact or dwarf variety of begonia 'pin up flame' from the start — that is the most reliable size control for an annual.
Grow it in a smaller container to naturally limit how large it gets.
For some crops, pinching or pruning the growing tips keeps the plant shorter and bushier.
Sow a little later or space plants closer if you specifically want smaller individual plants.

How to grow begonia 'pin up flame' bigger or faster

If you want it to fill the space sooner, push the conditions rather than hoping — for begonia 'pin up flame' the accelerators are:

Full sun, warm soil and steady water are what drive a crop to full size fastest.
Sow at the right time for your zone so it gets the whole season to size up.
Feed appropriately for the crop and never let it check (stall) from drought or cold.

Light is almost always the ceiling. The begonia 'pin up flame' light requirements page covers exactly how bright a spot it needs to grow at its potential instead of stalling.

When begonia 'pin up flame' outgrows the room (or the pot)

"Too big" usually arrives as one of these signs for begonia 'pin up flame':

It sprawls beyond its bed or container before harvest — usually a spacing or support issue.
It flops or needs staking once it hits full height.
Once it has fruited or bolted, it is at its final size for good — the next plant is a new sowing.

If it is the pot rather than the room, it is a repotting job, not a goodbye — see the begonia 'pin up flame' repotting guide. If you want more of this plant instead of a bigger one, the begonia 'pin up flame' propagation guide turns prunings into new plants.

Begonia 'Pin Up Flame' size — frequently asked questions

How big does begonia 'pin up flame' get?

Begonia 'Pin Up Flame' reaches around 25-35 cm tall and wide. when grown indoors. It sizes up fast and once, racing from seedling to full size in a single season; after cropping it is finished, so size is a within-season question.

Is begonia 'pin up flame' slow or fast growing?

Begonia 'Pin Up Flame' is a moderate grower. Expect a single growing season — it reaches full size in one year, then is done. Begonia 'Pin Up Flame' reaches its full size within one growing season — there is no "long-term" size, just how big it gets before you harvest or it dies back.

How long does begonia 'pin up flame' take to reach full size?

Roughly a single growing season — it reaches full size in one year, then is done. Light, pot size and feeding move that timeline more than anything else.

How do I keep begonia 'pin up flame' smaller?

Choose a compact or dwarf variety of begonia 'pin up flame' from the start — that is the most reliable size control for an annual. Grow it in a smaller container to naturally limit how large it gets. For some crops, pinching or pruning the growing tips keeps the plant shorter and bushier. Sow a little later or space plants closer if you specifically want smaller individual plants.

How can I make begonia 'pin up flame' grow bigger or faster?

Full sun, warm soil and steady water are what drive a crop to full size fastest. Sow at the right time for your zone so it gets the whole season to size up. Feed appropriately for the crop and never let it check (stall) from drought or cold.