A New Jersey (Zone 6) gardener lost all leaves on Nellie Stevens hollies last winter, was told a spray could prevent this, and seeks product recommendations after Holly-tone fertilizer helped recovery.
Nellie Stevens holly (Ilex 'Nellie R. Stevens') is semi-evergreen to deciduous in Zone 6. Winter leaf drop is normal genetic behavior, not a defect or disease. No spray prevents this—it's a cold-hardiness limit.
Holly-tone (acidifying fertilizer) maintains foliage color and health but cannot override genetic deciduousness in marginal zones.
Sources: Wayside Gardens, Musser Forests, Jung's, Evergreens.com, or Google "evergreen hollies Zone 6".
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