Ground frost warnings are only issued between 15 March and 31 October and for low-lying areas (below 600 m). Ground frost also occurs in the winter, but since this is not unusual for the season, warnings are not given during the winter period.

Ground frost warnings are only issued in level 2.

Meaning of danger level 2 (moderate danger)

The ground may freeze and plants may suffer frost damage.

Recommendations for action

• Cover plants with a protective layer, or place pot plants that are particularly susceptible to frost damage against a house wall or indoors.
• Protect sensitive materials against frost damage in good time.

Additional information

A distinction is made between ‘light to moderate’ and ‘heavy’ ground frost:

• Light to moderate: at temperatures between 0 and -4 degrees (at a height of 5 cm above ground level)
• Heavy: at temperatures below -4 degrees (at a height of 5 cm above ground level)