Shop by Category

Caeruleum Polemonium Flower Seeds

SKU: SFS-POL-CAE-ER

Our ‘Caeruleum’ Polemonium Flower seed is a North American native with deep lavender blue, and occasionally white, blossoms, normally appearing in the spring and depending upon their location in your garden, blooming again in late summer or early fall if deadheaded. Also called Greek Valerian, these showy plants will attract butterflies in droves and are an exceptional addition to the Cottage or Woodland Garden, or for naturalizing your landscape. Approximately 100 seeds per each hand-filled packet. More details...

You can earn 2 Rewards Points on this product!

Price: $2.68

Caeruleum Polemonium Flower Seeds

May we also suggest…

Check the check boxes next to the additional products that you would like to add to the shopping cart, then click on the "Add to Cart" button above. A check box is not shown if a product requires that you select an option or fill out a field. (

) indicates a required accessory.

Mini Seedmaster Hand Seeder

Price $3.25

Vacation, Anti-drought Plant Treatment

Price $12.00

Hydrofarm Germination Station

Price $34.49

Product Details

Caeruleum Polemonium Flower Seeds

Polemonium needs light to germinate, so sow atop the soil or in small indentations and do not cover, though you may press the seeds gently into the growing medium. Ideally, if starting Polemonium in the garden, your climate should be an indication of where is best to plant them. They will enjoy the full shade in hot climates but will thrive in sunny areas in cool climates. Not picky about pH, the soil can range from a pH of 5 to 8, but must be well-drained. If starting indoors ,Jacob’s Ladder should be started at least 8-weeks prior to the last frost date for your area, as germination can take as little as 10 days or as long as 4-weeks at soil temperatures of 68 to 72°F. You can also start them in seed trays 8-weeks before Autumn, transplanting them to a well-prepared and carefully selected area, ensuring they are well-established prior to the first hard frost of late fall or winter.

Mature Height: 12-36”
Mature Spread: 12-36”
Exposure: Full Sun in Northern Climes-Partial-Full Shade in Southern Climes
Bloom Time: Late Spring-Early Summer
Soil Moisture: Average-Moist, Well-drained
Soil Type: Widely Adaptable
Annual in zones: 1-2 & 8-11
Tender Perennial in zones: 3-7
What is my zone?

We also carry a variety of Polemonium Plants in individual 3” pots.

Back to the top

Shop by Category

Recently Viewed...

Caeruleum Polemonium Flower Seeds

Caeruleum Polemonium Flower Seeds