Cold hardiness & minimum temperature

Is Geum 'Prinses Juliana' (Geum 'Prinses Juliana')cold hardy? Hardiness zone & min temp

Also called Prinses Juliana avens, Princess Juliana avens.

More about geum 'prinses juliana'

About Geum 'Prinses Juliana'

Geum 'Prinses Juliana' · also called Prinses Juliana avens, Princess Juliana avens · flowering

A long-flowering hybrid avens prized for warm orange to apricot semi-double blooms held on wiry stems above mounds of soft green foliage. Flowering from late spring through summer with deadheading, it brings hot colour to cottage and mixed borders. Hardy and easy, it reaches roughly 50 cm and is a magnet for early pollinators.

Cold limit: USDA 5-9 · RHS H6 (-15 to 26°C)

Watch for — Winter wet rot: Crowns rot in waterlogged soil over winter; ensure sharp drainage, particularly on clay.

What geum 'prinses juliana''s hardiness rating actually means

Yes — geum 'prinses juliana' is genuinely cold hardy. Rated RHS H6 and USDA 5-9, it lives outdoors all year and needs winter cold rather than protection from it. Its RHS rating of H6 means: Hardy throughout the UK and northern Europe. On the US scale that maps to USDA 5-9 — 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

Minimum survivable temperature is roughly about −20 to −15 °C. Geum 'Prinses Juliana' is built for winter — once established it takes hard frost and snow in its stride.

Concretely, for geum 'prinses juliana' as it gets too cold:

It tolerates winter lows to about −20 to −15 °C once established.
Below its rated zone, the visible damage is browned or blackened top growth and, in the worst case, a killed crown or root.
First-year, newly planted, or container-grown specimens are noticeably less hardy than established garden plants — the roots are exposed.

Can geum 'prinses juliana' go outside or overwinter — and where?

Plant it out within USDA 5-9 and it overwinters with little or no help.
It does not want to come indoors — a warm winter room actually weakens a hardy plant by denying it dormancy.
The real risks in its range are waterlogging, wind-rock on young plants, and a late hard frost on new growth — not ordinary winter cold.

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 geum 'prinses juliana' can be outside. US growers can check USDA zones; UK growers should use the RHS hardiness ratings, which match the H6 figure above.

Geum 'Prinses Juliana' hardiness — frequently asked questions

Is geum 'prinses juliana' cold hardy?

Yes — geum 'prinses juliana' is genuinely cold hardy. Rated RHS H6 and USDA 5-9, it lives outdoors all year and needs winter cold rather than protection from it. An outdoor plant. Geum 'Prinses Juliana' is hardy across USDA 5-9; it belongs in the ground or a frost-proof container, not on a windowsill, and many types actively need a cold winter to perform.

What is the minimum temperature geum 'prinses juliana' can survive?

Minimum survivable temperature is roughly about −20 to −15 °C. Geum 'Prinses Juliana' is built for winter — once established it takes hard frost and snow in its stride.

What hardiness zone is geum 'prinses juliana'?

Geum 'Prinses Juliana' is rated USDA 5-9 and RHS H6 — Hardy throughout the UK and northern Europe.

Can geum 'prinses juliana' survive winter outside?

Plant it out within USDA 5-9 and it overwinters with little or no help. It does not want to come indoors — a warm winter room actually weakens a hardy plant by denying it dormancy. The real risks in its range are waterlogging, wind-rock on young plants, and a late hard frost on new growth — not ordinary winter cold.

What happens to geum 'prinses juliana' below its minimum temperature?

It tolerates winter lows to about −20 to −15 °C once established. Below its rated zone, the visible damage is browned or blackened top growth and, in the worst case, a killed crown or root. First-year, newly planted, or container-grown specimens are noticeably less hardy than established garden plants — the roots are exposed.