Mature size & growth rate

How big does Love-lies-bleeding (Amaranthus caudatus) get?

Also called love-lies-bleeding, tassel flower, velvet flower, pendant amaranth, quilete.

More about love-lies-bleeding

About Love-lies-bleeding

Amaranthus caudatus · also called love-lies-bleeding, tassel flower · flowering

Love-lies-bleeding is a dramatic warm-season annual grown for its long, pendulous, deep crimson flower tassels that drape from sturdy stems up to 1.5 m tall. Native to South America, it thrives in heat, full sun and well-drained soil. Its grain and leaves are edible in some cultures, but Amaranthus retroflexus (a close relative) is ASPCA-listed as toxic; treat ornamental Amaranthus with caution around pets.

Mature size: 90-150 cm tall, 45-60 cm spread

Watch for — Lodging (stem collapse): In exposed, windy sites tall plants may topple — stake with bamboo canes tied loosely at stem nodes, or shelter from strong wind; avoid excess nitrogen which weakens stems.

Indoor size vs how big it gets in the wild

Love-lies-bleeding 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 90-150 cm tall, 45-60 cm spread. 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

Love-lies-bleeding 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: apply a balanced granular fertiliser at planting. a monthly liquid feed with a balanced formulation during the growing season maintains healthy growth. avoid high-nitrogen feeds, which produce excessive foliage and reduce stem strength.

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

How to keep love-lies-bleeding smaller

You are not stuck with the maximum size. For love-lies-bleeding specifically, these are the levers, in order of impact:

Choose a compact or dwarf variety of love-lies-bleeding 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 love-lies-bleeding bigger or faster

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

When love-lies-bleeding outgrows the room (or the pot)

"Too big" usually arrives as one of these signs for love-lies-bleeding:

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

Love-lies-bleeding size — frequently asked questions

How big does love-lies-bleeding get?

Love-lies-bleeding reaches 90-150 cm tall, 45-60 cm spread 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 love-lies-bleeding slow or fast growing?

Love-lies-bleeding is a fast grower. Expect a single growing season — it reaches full size in one year, then is done. Love-lies-bleeding 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 love-lies-bleeding 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 love-lies-bleeding smaller?

Choose a compact or dwarf variety of love-lies-bleeding 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 love-lies-bleeding 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.