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When to bring myrtle inside

Enter a German postcode. We show when myrtle should come inside: from the cold limit in expert sources and the night-time lows where you are.

Where are your pots?

Average for Germany

Bring in by

13 November

In 9 out of 10 years it did not get colder than −5 °C (23 °F) before this. On average from 11 December.

Based on past records, not a forecast · Data: Deutscher Wetterdienst (CC BY 4.0)

Data: Deutscher Wetterdienst, daily minimum temperatures 1991–2020, own calculation. Licence CC BY 4.0. Postcode coordinates: GeoNames (CC BY 4.0).

How much cold can myrtle take?

Hardiness rating H4, meaning −10 °C (14 °F) to −5 °C (23 °F). We play safe and use −5 °C (23 °F). (RHS)

Only the RHS hardiness rating; no source gives a figure.

Other sources say

None of our other sources gives a figure.

We use the most cautious figure from the expert sources.

Winter quarters

Bright, 5–10 °C (41–50 °F) (Saxon Garden Academy)

Back outside

We don’t have a sourced value for this yet.

Questions and answers

When should myrtle come inside?

RHS: hardiness rating H4, meaning −10 °C (14 °F) to −5 °C (23 °F). We play safe and use −5 °C (23 °F). On average for Germany it gets that cold from 11 December, and not before 13 November in 9 out of 10 years.

How much cold can myrtle take?

RHS: hardiness rating H4, meaning −10 °C (14 °F) to −5 °C (23 °F). We play safe and use −5 °C (23 °F). Only the RHS hardiness rating; no source gives a figure.

How do you overwinter myrtle?

Bright, 5–10 °C (41–50 °F) (Saxon Garden Academy).

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Related

Last frost date by postcodeAverage and safe date for German postcodesHardiness zone by postcodeHow cold it gets where you are, and what copesWinter vegetables and frost hardy plantsWhat stays in the bed over winter and copes with frost

Sources

Show 5 sources
  1. RHS Find a plant: Myrtus communis (H4)
  2. Sächsische Gartenakademie (LfULG), Ute Kroll: Überwinterung von Kübelpflanzen (Stand Februar 2009)
  3. Deutscher Wetterdienst, Climate Data Center: Tageswerte (Klima) der Stationen, historisch
  4. Deutscher Wetterdienst: Vorgaben für die Gestaltung des DWD-Quellenvermerks
  5. GeoNames: Postal Code Dataset (DE.zip)

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