Caeruleum, but it is a little shorter and even more tolerant of cool conditions. Divide mature Greek valerian plants every two to four years or they will die out in the middle. The species forms and its different varieties send flower clusters on long stems in mid to late spring. Common names for these plants include bellflowers, charity, creeping or false Jacob's ladder, and American-Greek valerian.
The light blue or purple varieties are among the most popular and bloom in clear tones offset by yellow centers.
Is Jacob's ladder plant invasive?
Jacob's ladder blooms in the spring to early summer months, often at the same time as allium species and the bleeding heart plant. Greek valerian plants that are watered regularly will bloom longer and remain attractive well into summer. Even if you do not choose to divide your plants for propagation purposes and do not allow them to self-seed, division should be done every 3-4 years. The Jacob ladder plant is a forest perennial that prefers a shady to half-shaded location for growing.
You can simply cut out all the damaged material so that the plant can fill up with new growth again.
Where is the best place to plant Jacob's ladder?
It grows best on soils that are rich in organic materials and like a moist but not humid environment. Jacob's ladder (Polemonium caeruleum) is a popular choice for beginners due to its hardiness and easy care instructions, as well as its beautiful light blue to dark purple flowers. Jacob's ladder doesn't like to get too hot and therefore relies on the shade to lower the temperature by a few degrees and keep the plant happy. Because this perennial plant is native to temperate forests, Jacob's ladder is best suited for sites that mimic this environment.
The plant thrives on rich, organic soil. So it's a good idea to add compost to poor soil before planting.
Is Jacob's ladder a shade plant?
Varieties with dark green leaves can withstand direct sunlight than the variegated varieties, as long as the soil is kept constantly moist. Pruning is not essential to the health of Jacob's ladder plants, but occasional trimming helps keep it looking neat and attractive. Some popular Jacobs ladder varieties include “Bambino Blue,” a compact variety with delicate, pale blue flowers in contrast to yellow stamens; “Snow and Sapphire,” a robust variety with blue flowers and colorful leaves; “Bressingham Purple,” which thrives in shade and has light purple flowers. and “Stairway to Heaven” with pink or cream-colored, colorful foliage. The plant is a productive self-seeder. So if you're happy that new Jacobs ladder plants appear every year, you just don't have to kill the spent flowers.
Is Jacob's Ladder a perennial or an annual?
Polemonium reptan's 'Stairway to Heaven' (Creeping Jacob's Ladder) is considered by many to be the best colorful Jacob's Ladder ever introduced and is a herbaceous perennial that forms a low hill of colorful leaves of pale green and creamy white that are colored pink in cold weather. The plant is a productive self-seeder. So if you're happy that new Jacobs ladder plants appear every year, you just don't have to kill the spent flowers. The climate in which you grow the plant also affects the amount of light it can handle. Jacob's ladder, which grows in warmer regions, requires a higher proportion of shade throughout the day than in cooler climates. Feed Jacob's ladder plants once in early spring and again after the flowers have blossomed with a balanced fertilizer.