
Polemonium caeruleum
Polemoniaceae
Polemonium caeruleum , Jacob's Ladder
Family: Polemoniaceae
Genus: Polemonium
Clusters of small cup shaped blue/white flowers in summer. Pinnately divided mid green leaves. Traditional medicinal herb.
• Hardiness: H7 (-20 and below)
• Type: Hardy Perennial
• Height: up to 90cm
• Spread: 45cm%
Available as herb seeds.
• Soil type: Sand, Clay, Loam, Free Draining
• pH: Universal pH
• Habit: Bushy
• Flowering colour: Blue, White
• Flowering time: Summer
• Uses: Medicinal
• Attracts pollinators: No
• Container suitability: No
• UK native: Yes
• Caution: N/A
• Indoor Sowing: In early spring, into prepared plug trays or pots. Sow thinly, cover the seeds with a thin layer of compost.
• Outdoor Sowing: In late spring, in a fertile well draining soil. Thin seedlings to 30cm apart.
• Propagation: N/A
• Maintenance: N/A
• Harvest: N/A
For information on growing herbs from seeds please see Jekka's blogs on sowing seeds, sowing your winter culinary herbs or how to grow vegetables.
Jekka's "How to Grow Herbs" videos, includes Jekka's video on how to sow seeds for an informative step-by-step guide to seed sowing.
Growing indoors? Check out Jekka's blog on indoor herb gardening for some advice.
If you require pots or compost, see Jekka's Herb Kits that includes Jekka's Seed Sowing Kit. This kit contains all you need to sow a collection of herb seeds.
For more information on growing herbs plants please see Jekkapedia, Jekka's blog or our FAQs page.
Happy Herbs!
One of our three core roots is that we are Environmentally Conscious and for the past 30 years all the herbs grown at Jekka’s have been raised following sustainable, environmentally friendly and organic approaches resulting in a remarkable biodiversity at the herb farm.
Our herb seeds are also untreated and can be used to grow organic herb plants.
You can read more about our sustainability approach to growing herbs in one of Jekka's Blogs or in Jekka's Guide to Climate Change.