To feed your naturalized bulbs, work a good organic compost or well-rotted cow manure into the soil when planting. Then add a 1-inch layer of compost as a mulch each fall.
Alternatively, apply a slow-release bulb food, such 9-9-6, when planting, and again each fall (sprinkle fertilizer over the planting area at the rate recommended on the label).
To maintain your bulbs, avoid cutting back leaves before they have yellowed to allow bulbs to regenerate for next year's flowers. Allow the leaves to grow for at least six weeks after flowering.
Avoid working soil in early spring just as bulb foliage begins to grow and avoid any use of lawn herbicides while the bulb leaves are still green.

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