TEMPERATURE: Large decorative onions thrive in USDA hardiness zones 4 through 9, but they favor warm, sunny environments with moderate to low humidity levels. Ensuring that your giant onions are positioned in a well-lit area with adequate airflow is essential.
WHEN TO PLANT: To be planted in fall.
SUN & SOIL: Easily grown in rich, sandy to gritty, dry to medium moisture, well-drained soils in full sun.
HEIGHT: Grows up to 5-6 ft. tall. Allium giganteum naturalizes easily and will come back year after year.
EXPECTED BLOOMING PERIOD: Bloom from late spring to early summer.
TEMPERATURE: Large decorative onions thrive in USDA hardiness zones 4 through 9, but they favor warm, sunny environments with moderate to low humidity levels. Ensuring that your giant onions are positioned in a well-lit area with adequate airflow is essential.
WHEN TO PLANT: To be planted in fall.
SUN & SOIL: Easily grown in rich, sandy to gritty, dry to medium moisture, well-drained soils in full sun.
HEIGHT: Grows up to 5-6 ft. tall. Allium giganteum naturalizes easily and will come back year after year.
EXPECTED BLOOMING PERIOD: Bloom from late spring to early summer.