Aloe Vera Sunburn: Why Indoor Plants Burn When Moved Outside

Why Your Aloe Turns Brown Immediately Outdoors

An aloe that's overwintered indoors loses its protective UV pigments and cuticle thickness. When suddenly placed in direct sun, the leaves bleach brown uniformly—classic sunburn. The first summer may not cause damage if light levels were still moderate, but subsequent years show increased sensitivity.

Signs of Sunburn vs. Other Issues

• Sunburn: Entire leaf or large patches turn brown/white quickly; texture may become leathery. Plant recovers when returned to shade.
• Overwatering/rot: Leaves become mushy, translucent, foul-smelling; starts at base.
• Cold damage: Blackened, water-soaked areas after freeze.

Acclimation Protocol (Hardening Off)

1. Week 1: Place in full shade (north side of building, under dense tree) 2–3 hours daily.
2. Week 2: Increase to dappled morning sun (1–2 hours).
3. Week 3: Add 30 minutes more morning sun daily.
4. Week 4+: Most aloes tolerate 4–6 hours morning sun; afternoon shade essential in hot climates.

Recovery Care

Keep sunburned plant in bright shade. Do not remove damaged leaves until new growth appears—they still photosynthesize. Water sparingly; burned tissue loses less water. Resume normal care once new growth emerges.