GLADIOLUS--PLANTING
Gladiolus need to be planted after danger of frost.
The soil should be warmed to a depth of six (6) inches; oaks will be fully
leafed out. Corms planted in cool soil are apt to rot. Make sure the corms
or clean and healthy. Do not remove the tunic or outer papery layer.
Gladiolus prefer full sun, but will respond in locations
with some morning or late afternoon shade. Good air circulation is a must.
Incorporate no more than two to three (2 to 3) pounds
of a 5-10-10 or 5- 10-5 fertilizer per 100 square feet. Underfertilizing
is much better than overfertilizing.
Work the soil to a depth of eight (8) inches. As a
rule of thumb, plant gladiolus corms three times their diameter; for example,
a two (2) inch diameter corm should be planted six (6) inches deep and
six (6) inches apart. Corms planted in shallow soil are more likely to
fall over when blooming. Often, corms are covered with an inch or two
of soil until they sprout. Sprouts, like asparagus plantings, are covered
until the final soil line is achieved. Hilling corms is also a common
practice, especially if early summer blooms are desired. A "hill"
warms up faster than flat soil.
Gladiolus generally will bloom twelve (12) weeks after
planting.
See: Gladiolus staking; Gladiolus winter storage
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