Persicaria bistorta

Bistort does best when it gets plenty of sunlight during the day. It will also grow in spots with moderate sun, but its healthiest state comes from substantial sun exposure. Both too much and too little light can impede its growth, resulting in a weak, unhealthy plant.

Bistort does best in moderate temperatures, roughly those people normally find comfortable. It prefers conditions that are not too hot or too cold. The primary problem with high heat is sunburn, so offering some shade in summer is recommended to avoid excessive temperatures. When it gets cooler, Bistort becomes dormant; to maintain continuous growth you need to keep winter temperatures higher. Frost can damage the plant and should be avoided.

To maximize the yield and flavor of Bistort, provide sufficient nitrogen throughout the entire growth cycle, from before planting through to harvest. Plants that are well-watered and fertilized develop plentiful, healthy leaves and exhibit less bitterness. Before planting, amend the soil with organic matter such as compost or manure, preferably 2 to 8 weeks beforehand.