Jacob's ladder 'Blanjou'

Polemonium caeruleum

How to grow Jacob's ladder 'Blanjou'

  • Partial Sun

  • High

Try to plant in a location that enjoys partial sun and remember to water often. Keep in mind when planting that Blanjou is thought of as hardy, so this plant will survive close to or on freezing temperatures. Blanjou requires a soil ph of 5.5 - 7.5 meaning it does best in weakly acidic soil - weakly alkaline soil.

Growing Blanjou from seed

Ensure a seed sowing distance of 7.02 inches (18.0 cm). Soil temperature should be kept higher than 19°C / 66°F to ensure good germination.

By our calculations, you should look at sowing Blanjou about 56 days before your last frost date.

Transplanting Blanjou

Ensure that temperatures are mild and all chance of frost has passed before planting out, as Blanjou is a hardy plant.

Harvesting Blanjou