How far apart should I plant Water Pepper?

Plant Water Pepper 20cm apart with 30cm between rows.

When can I harvest Water Pepper?

Water Pepper is ready to harvest approximately 50 days after transplanting.

Water Pepper is classified as Half Hardy.

Persicaria hydropiper

Half Hardy Any Season Continuous Harvest

Sow indoors 4 weeks before last frost, or direct sow outdoors after frost risk has passed and soil reaches 10°C.

Sow seeds

Germination ~10d

Harvest ~78d

Sow seeds

Germination ~10d

Harvest ~78d

Approximate days from start

Care Essentials

Light feed at planting only. Growing in moist, fertile soil usually provides enough nutrition. Avoid heavy nitrogen feeding — it reduces the peppery flavour.
Water pepper thrives in moist to wet soil and partial shade, unlike most herbs. It self-seeds freely and can naturalise at pond margins or boggy areas. The peppery bite fades quickly with heat — add leaves raw or at the very end of cooking.

Companion Planting

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Growing Conditions

Min. soil temperature: 10°C+

Germination temperature: 10–20°C

Get a personalized schedule for Water Pepper based on your exact frost dates

Feeding: Light feed at planting only. Growing in moist, fertile soil usually provides enough nutrition. Avoid heavy nitrogen feeding — it reduces the peppery flavour.
Watch for: Slugs and snails
Aphids
Powdery mildew in dry conditions

How far apart should I plant Water Pepper?: Plant Water Pepper 20cm apart with 30cm between rows.
When can I harvest Water Pepper?: Water Pepper is ready to harvest approximately 50 days after transplanting.
Is Water Pepper frost hardy?: Water Pepper is classified as Half Hardy.

Plan Water Pepper in your garden — get personalized frost-date scheduling