Mature size & growth rate

How big does Popcorn (Zea mays var. everta 'Strawberry Popcorn') get?

Also called strawberry popcorn, ornamental popcorn.

More about popcorn

About Popcorn

Zea mays var. everta 'Strawberry Popcorn' · also called strawberry popcorn, ornamental popcorn · edible

Popcorn is a flint-type maize whose hard kernels burst when heated. 'Strawberry Popcorn' is a compact, ornamental variety with squat ruby-red cobs that double as decoration and snack. Grow like sweetcorn but leave cobs on the plant until fully ripe and dry, then cure further indoors before the kernels will pop reliably.

Mature size: 0.9-1.5 m (3-5 ft) tall, 30-40 cm wide; a heavy cropper of small 5-7 cm ornamental cobs.

Indoor size vs how big it gets in the wild

Popcorn 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 0.9-1.5 m (3-5 ft) tall, 30-40 cm wide. In the ground with no restriction it is a completely different plant — a heavy cropper of small 5-7 cm ornamental cobs. — which is why the pot, the light and the pruning matter so much for the size you actually end up with.

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

Popcorn is a fast grower. Realistically, expect a single growing season — it reaches full size in one year, then is done. Its feeding profile backs this up: moderate feeder. a balanced base dressing plus a nitrogen side-dressing when knee-high is ample; avoid heavy late nitrogen, which keeps plants green and delays the drying the cobs need.

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

How to keep popcorn smaller

You are not stuck with the maximum size. For popcorn specifically, these are the levers, in order of impact:

Choose a compact or dwarf variety of popcorn 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 popcorn bigger or faster

If you want it to fill the space sooner, push the conditions rather than hoping — for popcorn 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 popcorn light requirements page covers exactly how bright a spot it needs to grow at its potential instead of stalling.

When popcorn outgrows the room (or the pot)

"Too big" usually arrives as one of these signs for popcorn:

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 popcorn repotting guide. If you want more of this plant instead of a bigger one, the popcorn propagation guide turns prunings into new plants.

Popcorn size — frequently asked questions

How big does popcorn get?

Popcorn reaches 0.9-1.5 m (3-5 ft) tall, 30-40 cm wide when grown indoors, and far larger where it grows unrestricted (a heavy cropper of small 5-7 cm ornamental cobs.). 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 popcorn slow or fast growing?

Popcorn is a fast grower. Expect a single growing season — it reaches full size in one year, then is done. Popcorn 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 popcorn 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 popcorn smaller?

Choose a compact or dwarf variety of popcorn 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 popcorn 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.