Polygonum Aviculare
Prostrate Knotweed
Common knotgrass is an annual herb with a semi-erect stem that may grow from 10 to 40 cm. The flowers are regular, green with white or pink margins. The fruit is a dark brown, three-edged nut. The seeds need light to germinate which is why this plant appears in disturbed soil in locations where its seeds may have lain dormant for years.
Contributed by @markheadgardenermore
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Full sun to partial shade
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Occasional watering
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Full Frost Hardy: 5F (-15°C)
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Moist and free draining
Common name
Prostrate Knotweed
Latin name
Polygonum Aviculare
type
Herbaceous Perennials
family
Polygonaceae
ph
5.0 - 8.5 Acid - Neutral
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Light
Full sun to partial shade
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Frost
Full Frost Hardy: 5F (-15°C)
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Soil
Moist and free draining
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Water
Occasional watering
Plant & bloom calendar
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Best time to plant
full grown dimensions
0.60 M
0.40 M
Polygonum Aviculare
Common knotgrass is an annual herb with a semi-erect stem that may grow from 10 to 40 cm. The flowers are regular, green with white or pink margins. The fruit is a dark brown, three-edged nut. The seeds need light to germinate which is why this plant appears in disturbed soil in locations where its seeds may have lain dormant for years.
Planting Outdoors spring
From Early Spring TO Mid Spring
Plant out in the garden in full sun or partial shade. Whilst they prefer moist soil most will tolerate dry conditions but won't spread so much.
exultetbees
sarah1210
markheadgardenermore