Cold hardiness & minimum temperature

Is Hypoestes phyllostachya 'Splash Select Pink' (Hypoestes phyllostachya 'Splash Select Pink')cold hardy? Hardiness zone & min temp

Also called Pink polka dot plant.

More about hypoestes phyllostachya 'splash select pink'

About Hypoestes phyllostachya 'Splash Select Pink'

Hypoestes phyllostachya 'Splash Select Pink' · also called Pink polka dot plant · houseplant

The pink polka dot plant, Hypoestes phyllostachya 'Splash Select Pink', has green leaves heavily freckled and splashed with bright pink. A bushy tropical from Madagascar, it wants bright indirect light, steady moisture and warmth to keep its colour vivid. Compact and quick-growing, it benefits from regular pinching, and it is ASPCA pet-safe.

Cold limit: USDA 10-11 (grown as an annual or indoor plant in most US climates) · RHS H1b (18-27°C)

What hypoestes phyllostachya 'splash select pink''s hardiness rating actually means

Hardiness works differently for hypoestes phyllostachya 'splash select pink': it is grown as a seasonal crop, not overwintered. The question is not "what zone" but "how long is your frost-free growing window". Its RHS rating of H1b means: Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season. On the US scale that maps to USDA 10-11 (grown as an annual or indoor plant in most US climates) — the zones where it can be left outdoors year-round.

New to these scales? The USDA hardiness zone map explained covers how the zone numbers work, and you can find your own zone with the zone finder.

Minimum temperature — and what happens below it

As an annual crop, its "minimum temperature" is the first hard frost — that is the end of the plant's life, not a survivable low. Many types are also damaged by light frost (around 0 °C).

Concretely, for hypoestes phyllostachya 'splash select pink' as it gets too cold:

Light frost (around 0 to −2 °C) damages or kills tender summer crops outright; cold-hardy types take a few degrees of frost.
The plant does not "survive winter" — its life cycle simply ends, by design, when frost arrives or it finishes cropping.
A surprise late spring frost can also kill young transplants set out too early, before the season even starts.

Can hypoestes phyllostachya 'splash select pink' go outside or overwinter — and where?

Time it to your frost dates: sow or plant out after the last spring frost, and aim to harvest before the first autumn frost.
In short-season zones, start it indoors or under cover to stretch the effective growing window.
Hardier crops in this group can be sown for an autumn or overwintered harvest in mild zones — check the specific crop.

Work back from your local frost dates with the frost-date calculator: the last spring frost and first autumn frost are what really decide when hypoestes phyllostachya 'splash select pink' can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H1b figure above.

Frost protection for borderline hypoestes phyllostachya 'splash select pink'

Hypoestes phyllostachya 'Splash Select Pink' is right on a hardiness edge in many gardens, so if you are pushing it, these measures buy it the margin it needs:

Use fleece, cloches or a cold frame at each end of the season to dodge a borderline frost and add growing weeks.
Have row cover ready for an unexpected late spring or early autumn frost.
Know your local last- and first-frost dates and count back the crop’s days-to-maturity to schedule the sowing.

Hypoestes phyllostachya 'Splash Select Pink' hardiness — frequently asked questions

Is hypoestes phyllostachya 'splash select pink' cold hardy?

Hardiness works differently for hypoestes phyllostachya 'splash select pink': it is grown as a seasonal crop, not overwintered. The question is not "what zone" but "how long is your frost-free growing window". A seasonal crop, not a perennial. Hypoestes phyllostachya 'Splash Select Pink' is grown 10-11 (grown as an annual or indoor plant in most US climates); you sow after the last frost and harvest before the first one, then start again next year.

What is the minimum temperature hypoestes phyllostachya 'splash select pink' can survive?

As an annual crop, its "minimum temperature" is the first hard frost — that is the end of the plant's life, not a survivable low. Many types are also damaged by light frost (around 0 °C).

What hardiness zone is hypoestes phyllostachya 'splash select pink'?

Hypoestes phyllostachya 'Splash Select Pink' is rated USDA 10-11 (grown as an annual or indoor plant in most US climates) and RHS H1b — Sub-tropical — a normal warm home is fine, but it cannot go outside in a cool season.

Can hypoestes phyllostachya 'splash select pink' survive winter outside?

Time it to your frost dates: sow or plant out after the last spring frost, and aim to harvest before the first autumn frost. In short-season zones, start it indoors or under cover to stretch the effective growing window. Hardier crops in this group can be sown for an autumn or overwintered harvest in mild zones — check the specific crop.

How do I protect hypoestes phyllostachya 'splash select pink' from frost?

Use fleece, cloches or a cold frame at each end of the season to dodge a borderline frost and add growing weeks. Have row cover ready for an unexpected late spring or early autumn frost. Know your local last- and first-frost dates and count back the crop’s days-to-maturity to schedule the sowing.