'Plumosum' is a cultivar of Grape Hyacinths, a flowering bulb in the asparagus family. The 'Plumosum' cultivar is a clump forming perennial distinguished from other grape hyacinths by its open, feathery, violet blooms and branched purple stems that appear in May. The urn-shaped, grape-like flower clusters of other hyacinth species are not present on 'Plumosum'. 'Plumosum' grows best in full sun with average, well-drained soil and consistent moisture during the growing season. However, it will tolerate partial shade, clay soil, and summer drought. Reduce watering later in the season when the foliage begins to die off and the plant goes dormant. The plants may require mulching in the winter and early spring if temperatures go below 24 degrees F. For best results, plant 'Plumosum' 5 inches deep to the base of the bulb, spacing the plants 1 inch apart, or 30 to 60 plants per square foot. If clumps become congested, the plants can be divided. 'Plumosum' is a relatively short plant, maturing to a height of 6 to 9 inches with colorful blooms and is especially useful in borders, rock gardens, and woodland gardens. Insects, Diseases, and Other Plant Problems: No known diseases or insect pests. May be damaged by Spring frosts if not protected with mulch.
Curated pairwise relationships between this plant and others in the library — who feeds
whom, who competes, who confuses the pests. Green reads as a good pairing, red as one to avoid.
No curated interactions recorded for this species yet.
Also noted by NC State
Related species the NC State Plant Toolbox flags for this plant — look-alikes to tell
apart, and plants that play a similar role in a planting. Ones we carry in the library are linked.