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Polygonum (Knotweed)

Knotweeds are mostly native of the temperate zone in the northern hemisphere, a couple of species occur in tropical regions. Most are fast growing annuals to perennials. Several annual species have a good ornamental value for their showy terminal flower spikes in pure white, brilliant rose or deep lilac colors. Easily grown in any rich, well drained soil with sufficient moisture in summer.
Sow from autumn to late spring in any well drained substrate. Keep soil always slightly moist and pots in a sunny and proteced spot outside. Transplant seedlings as soon as they are strong enough.
All plants are from USDA Climate Zone 6.
20 seeds per package.
Articles
Polygonum filiforme (Japanese Knotweed)

Polygonum filiforme (Japanese Knotweed)

40 (70)cm, Japanese Knotweed, (syn. Antenoron filiforme) is a fast growing herbaceous perennial with yellowish-green leaves with red markings and lax racemes with reddish-violet flowers. Easily grown in any humus rich, well drained soil in a sunny to partially shaded spot with sufficient moisture in summer. VI-VIII.
20 seeds per package.

price (plus Shipping Costs)
seed package8105 € 4,99
Polygonum orientale (Kiss-Me-Over-the-Garden-Gate)

Polygonum orientale (Kiss-Me-Over-the-Garden-Gate)

120 (160)cm, Kiss-Me-Over-the-Garden-Gate is a fast growing most ornamental annual species from south-eastern Asia and Australia with numerous showy, pendulous bright rose-lilac flower racemes above broadly ovate leaves. Easily grown in any rich, well drained soil in a sunny to partially shaded spot with sufficient moisture in summer. Will selfsow under appropiate conditions. VII-IX.
20 seeds per package.

price (plus Shipping Costs)
seed package 6307 € 3,99*
* This price is valid if a single item is ordered only. The shop will automatically assign discounts on bulk purchases. If several packages are ordered from this species, they will be merged into a single package. Please refer to our General Terms of Business.
Polygonum pensylvanicum (Pennsylvania Smartweed)

Polygonum pensylvanicum (Pennsylvania Smartweed)

60 (180)cm, Pennsylvania Smartweed is a fast growing and very variable annual from North America with several pale rose to pink flower heads above lanceolate leaves. Easily grown in any rich, well drained soil in a sunny to partially shaded spot with sufficient moisture in summer. Will selfsow under appropiate conditions. VII-IX.
20 seeds per package.

price (plus Shipping Costs)
seed package9296 € 3,99*
* This price is valid if a single item is ordered only. The shop will automatically assign discounts on bulk purchases. If several packages are ordered from this species, they will be merged into a single package. Please refer to our General Terms of Business.