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Flowers: BULBS

Bulb Planting Guidelines

.
BULB
 
DEPTH1
 
   SPACING2   
 
QUANTITY3
(bulbs/sq.ft)
WHEN4
 
Agapanthus sp1" 12-18"    .5-1 any season
Allium Globemaster 3Xheight 10"    1 fall
Other Allium sp. 3Xheight 3-5"    5-15 fall
Amaryllis belladonna
 
2-12"
 
12-18"   
 
.5-1
 
immediately
after blooming
Anemona blanda 2-3 2-4"    10-15 fall,early spring
Anemona coronaria 2-3 4-8"    4-10 fall,early spring
Caladium x hortulanum 1-3" 12"    1 spring
Canna x generalis 3-5" 12-24"    .5-1 spring
Crocus sp. 2-3" 2-4"    10-15 fall
Fritillaria Imperialis    6" 12"    2-3 early fall
Fritillaria Meleagris    3-4" 3-4"    8-15 early fall
Gladiolus x hortulanus 2-6" 4"    5-10 early fall
Hyacinthus orientalis hybrids 6-7" 6"    4-5 early fall
Iris, Bearded
 
barely
covered
12-18"   
 
.5-1
 
late summer,
early fall
Iris cristata <1" 3"    8-15 early fall
Iris Dutch 3-4" 4"    5-10 fall
Iris kaempferi 2" 12-15"    1 spring,early fall
Iris, Louisiana 3" 12-48"    .3-1 early fall
Iris, Reticulata 4" 4"    5-10 fall
Iris sibirca 2" 12-15"    1 fall
Lilium sp. 4" 12"    1 fall,early spring
Muscari sp.
 
3"
 
4"   
 
5-10
 
late summer
early fall
Narcissus sp. (Daffodils) 2-6" 5-8"    3-5 fall
Tulipa sp. 4-6" 4-6"    4-8 fall
Other minor bulbs4 2-3" 2-4"    10-15 fall

1. Planting depths refer to depth of soil from top of bulb. Bulbs
in light, fluffy soil can be planted deeper, in heavy soil shallower.
Deep planting provides insulation in hot or cold climates.
2. Bulb spacing suggested provides for a mass planting effect
while allowing space for 2 to 3 years growth before the need to
divide the bulbs.
3. For larger beds multiply the average number of bulbs per
square foot by the area in square feet.
4. See bulb packaging or supplier for details.