Pickerel weed
Common Name: Pickerel weed
Genus: Pontederia
Species: cordata
Skill Level: Experienced
Exposure: Full sun
Hardiness: Hardy
Soil type: Boggy
Height: 90cm
Spread: 75cm
Time to divide plants: April to May
Flowering period:
August
to
September
This is a glorious water plant, not least for its conspicuous tight spikes of blue flowers towards the end of the season. It is a North American native, naturally colonising large areas of swamps, and the plants are happiest where they can spread freely in marginal mud. To confine their spread they are best planted in baskets, but make sure they are covered by 23-30cm (9-12in) of water in cold districts to ensure their safety from frost. They also grow well in bog gardens, but should be mulched for protection in early winter. The Royal Horticultural Society has given it its prestigious Award of Garden Merit.
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