66074

Nasturtium officinale

Watercress

A table displaying which months are best to sow, plant and harvest.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Flowers
Flowers

Plant does not flower in January

Plant does not flower in February

Plant does not flower in March

Plant does not flower in April

Plant does flower in May

Plant does flower in June

Plant does flower in July

Plant does not flower in August

Plant does not flower in September

Plant does not flower in October

Plant does not flower in November

Plant does not flower in December

  • Botanical name: Nasturtium officinale
  • Common name: Watercress
  • Family: Brassicaceae
  • Plant Type: Bog, Herb, Marginal, Perennial, Pond
Flower colour:

White

Foliage colour:

Green

Watercress has peppery leaves, which are commonly used in salads and soups. Although more used to growing wild in flowing streams, watercress can easily be raised in a container or garden pond – as long as its feet are kept wet and the water is replenished every week, you should be able to harvest watercress all year round.

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Sow seeds on moist compost in spring, and plant out young plants when all risk of frost has passed. If growing your watercress in a pot, make sure it’s sitting in a tray of water. Alternatively, grow plants in an aquatic pot and place this in the shallows of your pond.

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Avoid harvesting watercress from the wild as plants may be harbouring liver flukes, which can be damaging to human health.

How to grow Nasturtium officinale

  • Plant size

    30cm height

    20cm spread

  • Sun exposure: Dappled shade, full sun
  • Hardiness: Hardy
  • Soil type: Boggy
  • Plant care: Needs regular watering in pots

Plant calendar

A table displaying which months are best to sow, plant and harvest.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Sow
Sow

Do not Sow in January

Do not Sow in February

Do Sow in March

Do Sow in April

Do Sow in May

Do not Sow in June

Do not Sow in July

Do not Sow in August

Do not Sow in September

Do not Sow in October

Do not Sow in November

Do not Sow in December

Plant
Plant

Do not Plant in January

Do not Plant in February

Do not Plant in March

Do not Plant in April

Do Plant in May

Do Plant in June

Do Plant in July

Do Plant in August

Do Plant in September

Do not Plant in October

Do not Plant in November

Do not Plant in December

Flowers
Flowers

Plant does not flower in January

Plant does not flower in February

Plant does not flower in March

Plant does not flower in April

Plant does flower in May

Plant does flower in June

Plant does flower in July

Plant does not flower in August

Plant does not flower in September

Plant does not flower in October

Plant does not flower in November

Plant does not flower in December

Harvest
Harvest

Do not Harvest in January

Do not Harvest in February

Do not Harvest in March

Do not Harvest in April

Do Harvest in May

Do Harvest in June

Do Harvest in July

Do Harvest in August

Do Harvest in September

Do not Harvest in October

Do not Harvest in November

Do not Harvest in December

Nasturtium officinale and wildlife

Nasturtium officinale has no particular known value to wildlife in the UK.

Is Nasturtium officinale poisonous?

Nasturtium officinale can be toxic.

Toxic to:

Toxic to Cats

Toxic to Dogs

No reported toxicity to:

No reported toxicity to Birds

No reported toxicity to Horses

No reported toxicity to Livestock

No reported toxicity to People