Water
Keep soil consistently moist, especially during dry periods. Water deeply when the top 2-3 cm of soil feels dry. Avoid waterlogged conditions, as this can lead to root rot.
Reduce watering frequency in winter when the plant is dormant.
Also known as Dwarf Japanese Knotweed
Reynoutria compacta, or Dwarf Knotweed, is a non-flowering perennial with attractive foliage, forming dense clumps. It is an ornamental groundcover.
At-a-glance light, water, soil, and growing conditions from plant data
Full sun to partial shade.
75% intensity
Prefers at least 6 hours of direct sunlight daily for best flowering and growth.
Consistent moisture, but avoid waterlogging.
50% intensity
Water when topsoil is dry; reduce in winter.
Well-drained, moist, fertile
50% intensity
Hardy.
25% intensity
Tolerates a wide range of temperatures, from cold winters to warm summers.
Low to moderate.
25% intensity
Apply balanced fertilizer in spring; compost is also beneficial.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
| Edible | No |
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Keep soil consistently moist, especially during dry periods. Water deeply when the top 2-3 cm of soil feels dry. Avoid waterlogged conditions, as this can lead to root rot.
Reduce watering frequency in winter when the plant is dormant.
Prune in late winter or early spring before new growth begins. Remove any dead, damaged, or weak stems. You can also prune to maintain desired size and shape. Cut back to a healthy bud or the ground.
Propagation is typically done by division of rhizomes in early spring. Carefully dig up the plant and separate the fleshy rhizomes, ensuring each piece has at least one bud. Replant immediately in well-draining soil.
Repotting is generally not necessary unless the plant becomes pot-bound. This invasive species is best grown in the ground where it can spread.
If container-grown, repot in spring every 2-3 years into a larger container with fresh potting mix.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Dwarf Knotweed (Reynoutria compacta)
Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Magnoliopsida |
| Order | Caryophyllales |
| Family | Polygonaceae |
| Genus | Reynoutria |
| Species | Reynoutria compacta |
Similar in genus Reynoutria
Answers based on plant encyclopedia data
