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When to bring lemon verbena inside

Enter a German postcode. We show when lemon verbena 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

12 October

In 9 out of 10 years the first frost came later. On average it freezes from 27 October.

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 lemon verbena take?

Bring in before the first frost. (DLR Rheinpfalz)

The same source says it is only hardy to about −4 °C (25 °F); for a short time it survives down to −10 °C (14 °F).

Other sources say

  • −4 °C (25 °F) (DLR Rheinpfalz)
  • hardiness rating H3: −5 °C (23 °F) to 1 °C (34 °F), for plants in the ground in the UK (RHS)

We use the most cautious figure from the expert sources.

Winter quarters

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

Back outside

After the last frost. On average for Germany it is over by 19 April, in 9 out of 10 years by 6 May. (DLR Rheinpfalz)

Questions and answers

When should lemon verbena come inside?

DLR Rheinpfalz: bring in before the first frost. On average for Germany it gets that cold from 27 October, and not before 12 October in 9 out of 10 years.

How much cold can lemon verbena take?

DLR Rheinpfalz: bring in before the first frost. The same source says it is only hardy to about −4 °C (25 °F); for a short time it survives down to −10 °C (14 °F). Other sources say: DLR Rheinpfalz: −4 °C (25 °F).

When can lemon verbena go back outside?

After the last frost. On average for Germany it is over by 19 April, in 9 out of 10 years by 6 May.

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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. DLR Rheinpfalz (Josef Schlaghecken): Aloysia triphylla – Zitronenverbene (27.08.2006)
  2. RHS Find a plant: Aloysia citrodora (H3)
  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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