Table 1. Basic Flowering Periods, Usage and Requirements for Flower Bulbs used as Perennials

Flowering Period
Scientific Name
Flower
Colors
Depth of Planting
(inches/ cm)
Spacing Between Bulbs
(inches/ cm)

Average Plant Height
(inches/ cm)

Garden Usages
Very Early Spring Crocus chysanthus Blue, Yellow, White 5/12.5 2/5 3/7.5 Rock gardens, ground covers, lawns, beds, amongst shrubs and trees.
Crocus sieberi Blue 5/12.5 2/5 3/7.5 Rock gardens, ground covers, lawns, beds, amongst shrubs and trees.
Crocus tommasinianus Purple 5/12.5 3/7.5 4/10 Rock gardens, ground covers, lawns, beds, amongst shrubs and trees.
Eranthis spp. Yellow 5/12.5 1/2.5 4/10 Rock gardens, beds, amongst shrubs and trees.
Galanthus spp. White 5/12.5 1/2.5 5/12.5 Rock gardens, beds, amongst shrubs and trees.
Iris reticulata 'Harmony' Blue 5/12.5 1/2.5 6/15 Rock gardens, beds, amongst shrubs and trees.
Narcissus Hardy I and II White, Yellow, Bicolors 8/20 3/7.5 14/35 Beds, borders, rock gardens, meadows, boreders of shrubs and trees
Early Spring Anemone blande cvs. Rose, Blue, White 5/12.5 2/5 4/10 Rock gardens, beds, sunny borders of shrubs and trees.
Chionodoxa spp. Blue 5/12.5 1/2.5 5/12.5 Rock gardens, ground covers, lawns, beds, amongst shrubs and trees.
Crocus flavus Yellow 5/12.5 2/5 3/7.5 Rock gardens, ground covers, lawns, beds, amongst shrubs and trees.
Crocus vernus Purple, White, Striped 5/12.5 3/7.5 4/10 Rock gardens, ground covers, lawns, beds, amongst shrubs and trees.
Hyacinthus orientalis Blue, Pink, Red,Lavender, White,Yellow, Orange 8/20 2/5 10/25 Beds, borders, and rock gardens.
Narcissus Hardy I and II

White, Yellow, Bicolors

8/20 3/7.5 14/35 Beds, shows, borders, cut flowers, ground covers, amongst trees and shrubs.
Scilla siberica Blue 5/12.5 2/5 7/17.5 Beds, borders, rock gardens, lawns,amongst trees and shrubs.
Scilla tubergeniana Whitish 5/12.5 2/5 7/17.5 Beds, borders, rock gardens, lawns, amongst shrubs and trees.
Middle Spring Clivia miniata Orange 5/12.5 12/30 22/55 Beds, rock gardens.
Convallaria majalis White 3/7.5 2/5 8/20 Beds, rock gardens, amongst shrubs and trees.
Erythronium 'Pagoda' Yellow 5/12.5 2/5 12/30 Beds, rock gardens, ground covers, sunny borders of trees and shrubs.
Fritillaria meleagris White, Purple 5/12.5 2/5 8/20 Beds, rock gardens, ground covers, sunny borders of trees and shrubs.
Leucojum aestivum White 5/12.5 2/5 14/35 Beds, rock gardens, ground covers, borders of trees and shrubs.
Muscari armeniacum Dark Blue 5/12.5 5.5/8.75 6/15 Rock gardens, sunny borders of trees and shrubs.
Muscari azureum Light Blue 5/12.5 1/2.5 6/15 Rock gardens, sunny borders of trees and shrubs.
Muscari botryoides album White 5/12.5 1/2.5 5/12.5 Rock gardens, sunny borders of trees and shrubs.
Narcissus Hardy I and Hardy II White, Yellow, Bicolors 8/20 3/7.5 12/30 Beds, borders, fresh cut flowers, ground covers, trees and shrubs.
Puschkinia libanotica Bluish-white 5/12.5 2/5 5/12.5 Rock gardens, beds, ground covers, and sunny borders of trees and shrubs.
Scilla (Endymion)
campanulata
Blue, Pink, White 5/12.5 2/5 10/25 Beds, borders rock gardens, ground covers, trees and shrubs.
Tulipia cvs. Most colors 8/20 2/5 14/35 Beds, borders, rock gardens, fresh cut flowers.
lpheion (Triteleia) uniflorum Light Blue 5/12.5 3/7.5 4/10 Rock gardens, lawns, sunny borders of trees and shrubs.
Late Spring Allium
aflatunense
Purple 5/12.5 3/7.5 30/75 Beds, rock gardens, meadows, cut flowers, and ground covers.
Allium karataviense Lilac to Pink 5/12.5 8/20 10/25 Beds, rock gardens, sunny borders of trees and shrubs.
Amaryllis
(Hippeastrum)
Various colors 8/20 10/25 30/75 Beds, borders, show, fresh cut flowers.
Camassia spp. Blue 8/20 4/10 26/65 Beds, meadows, sunny borders trees and shrubs, and rock gardens.
lxiolirion montanum
(pallasii)
Light Purple 5/12.5 5/12.5 20/50 Beds, rock gardens, ground covers, sunny borders of trees and shrubs.
Narcissus Hardy I and II Yellow, White, Bicolors 8/20 4/10 14/35 Beds, borders, fresh cut flowers, ground covers, sunny borders of trees and shrubs.
Ornithogalum umbellatum White 5/12.5 3/7.5 5/12.5 Beds, borders, ground covers, rock gardens, and amongst trees and shrubs.
Tulipia cvs. Various colors 8/20 4/10 18/45 Beds, borders, cut flowers.
Very Late Spring to Early Summer Allium christophii Silvery Purple 5/12.5 12/30 24/60 Beds, fresh and dried cut flowers, rock gardens, and ground covers.
Allium giganteum Purple 8/20 12/30 40/100 Beds, show, fresh cut flowers.
Allium moly
(luteum)
Yellow 5/12.5 3/7.5 10/25 Beds, rock gardens, sunny borders of trees and shrubs, and ground covers.
Allium
oreophilum
Red 5/12.5 3/7.5 10/25 Beds, rock gardens, sunny borders of trees and shrubs, and ground covers.
Allium sphaerocephalon Reddish Purple 5/12.5 3/7.5 30/75 Beds, sunny borders, fresh and dried cut flowers.
Brodiaea (Triteleia)
laxa
Blue 5/12.5 4/10 18/45 Beds, rock gardens, fresh cut flowers.
Lilium candidum White 1/2.5
above bulb nose
5/12.5 40/100 Beds, show, rock gardens.
Summer Amaryliss belladonna Pink 5/12.5 10/25 30/75 Beds, sunny borders of trees and shrubs, show, and rock gardens.
Belamcanda chinensis Orange 5/12.55 3/7.5 30/75 Beds, sunny borders of trees and shrubs.
Canna spp. Red, Yellow, Orange, Bicolor, Others 5/12.5 12/30 54/135 Beds, sunny borders of trees and shrubs.
Crinum Whte, Pink 8/20 12/30 36/90 Beds, sunny borders of trees and shrubs, and show.
Crinodonna Pink 8/20 12/30 42/105 Beds, sunny borders of trees and shrubs, and show.
Crocosmia
(Montbretia)
Red, Yellow, Orange 5/12.5 2/5 37/92.5 Beds, borders, and fresh cut flowers
Eucomis bicolor Green-White 5/12.5 12/30 18/45 Accent plant, fresh cut flowers, beds, and sunny borders of trees and shrubs.
Liatris spicata Blue, White 5/12.5 3/7.5 36/90 Beds, rock gardens, and fresh cut flowers.
Lilium - Asiatic hybrids Orange, Yellow, Pink, etc. 8/20 5/12.5 36/90 Beds, fresh cut flowers and sunny borders.
Lilium - Oriental White, Pink, Red 8/20 5/12.5 48/1220 Beds, fresh cut flowers and sunny borders.
Lycoris radiata Red 5/12.5 12/30 36/90 Beds and sunny borders.
Lycoris
squamigera
Rose 5/12.5 12/30 36/90 Beds and sunny borders.
Nerine Pink 8/20 12/30 20/50 Beds, rock gardens and sunny borders.
Late Summer Fall Colchicum autumnale White, Lilac Rose 5/12.5 2/5 7/17.5 Beds, sunny borders of trees and shrubs, and meadows.
Narcissus White, Yellow 8/20 2/5 40/16 Beds, rock gardens, fresh cut flowers, and sunny borders of trees and shrubs.