Black spots appearing after one cold garage night confirm cold damage. Highland Nepenthes need 50-60°F nights with 70°F days—garage temps in 30s/40s are too cold even for highlanders. Brief house warming (60-70°F) for a week is safer than unheated garage. Jambans thrive at 55-65°F nights/70s days.
7.5-Ft Cactus Blown Over, Cracked, Black Gash: Cut Black Parts, Callus, Replant
Black Spots on Outdoor Aloes: Likely Insects, Use Systemic Insecticide
Black Spots on Small Cacti: Root Mealybugs or Rot?
Oncidium Tiny Black Leaf Spots: Usually Harmless, Sometimes a Warning
Identifying and Treating Spots on Rose Leaves
Black Leaf Spots on Corkscrew Willow: Late-Season Fungal Spots and Prevention
Black Spots on Japanese Maple Bark: Likely Harmless Lichens
Black Spots on Maple Leaves: Tar Spot Fungus—Rake Leaves, Reduce Inoculum, Tree Usually Fine
Black Spot on Large Trees: Rake Leaves, Don't Worry
Yucca Black Spots: Fungus, Bacteria, or Scale?
Rubber Tree Black Spots: Sunburn, Not Fungus
Black Spots on Philodendron Xanadu: Harmless or Scale Insects?
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