1 named cultivar

‘Color Flash Lime’Poinsettia Color Flash Lime

shrubN. America Native

Poinsettia

The Story

Plant Bio

Euphorbia pulcherrima, poinsettia, is a leggy semi-evergreen shrub from Mexico and Guatemala, reaching three to twelve feet outdoors. Large dark green ovate leaves clothe upright stems, and in winter the uppermost leaves colour scarlet, pink or cream — those coloured bracts are what people take for flowers, while the true flowers are the small yellow cups at their centre.

It is a substantial outdoor shrub in its native range, not the compact pot plant sold at Christmas, which is chemically dwarfed and forced. Getting one to colour again needs strict darkness for fourteen hours a night for about eight weeks from autumn — any light break resets it. Its reputation as deadly is overstated, though the sap does irritate.

Uses & Benefits:

Large scarlet, pink or cream bracts in midwinter, on a plant that is a real shrub outdoors.

Can be kept and reflowered year after year rather than discarded, given the dark treatment.

In its native Mexico it is a substantial shrub visited by pollinators at the true flowers.

Essentials

At a Glance

Plant Type

Shrub

Height

90 inches

Width

66 inches

Light

Full Sun, Partial Sun

Zones

9, 10

Water

Moderate

Humidity

Moderate to high

Lifespan

Perennial

Native To

Mexico to Guatemala

Toxicity

Toxic if eaten; sap irritates skin

Planting

How to Grow

Keep it above 60F and out of cold draughts.
Give it bright indirect light indoors.
Water when the surface dries; never leave it standing.
Cut back hard in spring after the bracts fade.
For rebloom, give fourteen hours of full darkness nightly from autumn.
Wear gloves when cutting; the latex irritates skin.

Pro Tip

Any light at all during those fourteen dark hours resets the clock — a hall light through an open door is enough to stop it colouring.

Keep It Thriving

Care Guide

Do

Keep it warm and draught-free 🌡️
Give it complete darkness nightly to rebloom 🌑
Cut back hard in spring ✂️
Wear gloves when pruning 🧤

Don't

Let it sit in a cold draught ❌
Leave it in a wrapped sleeve ❌
Break the dark period with any light ❌

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cut Back
Dark Treatment

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Winter houseplant for a bright warm roomOutdoor flowering shrub in frost-free gardensContainer plant moved under cover for winter

Companion Plants

Croton Christmas Cactus AmaryllisNorfolk Island Pine Cyclamen

Multiply

Propagation Methods

Good to Know

Common Questions

Poinsettia questions

What zones can Poinsettia grow in?

Poinsettia is hardy in USDA Zones 9–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Poinsettia deer resistant?

Not reliably. Deer may browse Poinsettia, especially tender spring growth — plan on repellents or fencing where pressure is high.

When does Poinsettia bloom?

Poinsettia typically blooms in winter through early fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Poinsettia need full sun?

Poinsettia does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Poinsettia drought tolerant?

Yes — once established (usually after the first full season), Poinsettia handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.