Plant care guide
Monstera Sunburn: What It Looks Like and How to Fix It
Updated
Why does my Monstera deliciosa have sunburn?
Monstera sunburn shows as pale, bleached or yellow-white patches on the leaves facing the light, which later turn brown and brittle. It usually follows a jump in light: a move outdoors, to a sunnier window, or a seasonal change that brings direct sun onto the leaves.
What to do first
Move the plant back from direct sun or filter the light, and keep the mix from drying out. Leave leaves that are still mostly green, and next time increase light gradually over 10 to 14 days.
Bleached patches on a big Monstera leaf are hard to look at, because each leaf takes a long time to grow. The damaged tissue will not recover. The plant almost always does, once the light is right.
UConn’s Monstera factsheet puts it plainly: be vigilant when acclimating this plant to new light, because its large leaves burn easily.
What Monstera Sunburn Looks Like
University of Maryland Extension’s excess light page describes pale, bleached or faded areas that eventually become brown and brittle. It notes symptoms are more severe when strong sun is combined with dry soil.
Clues that point to sun:
- Damage on the leaves, or the parts of leaves, facing the window or sky
- Pale, washed-out or yellow-white patches first, browning later
- Shaded leaves on the same plant look normal
- A recent move outdoors, to a brighter room, or a season change
Sunburn or Something Else?
| Pattern | More likely cause |
|---|---|
| Bleached, then brown patches on exposed leaves after a light change | Sunburn |
| Brown, crisp leaf edges all around the plant | Low humidity or salts |
| Damage after a cold night outside or near cold glass | Cold injury |
| Spots with yellow halos or water-soaked edges, spreading | Leaf spot disease |
| Silvery patches with tiny dark specks, often under the leaf | Thrips |
UW–Madison Extension’s Monstera article says leaf edges brown when humidity is too low. UConn warns Monstera is easily burned by high soil salts and is damaged by extended exposure below 7 °C (45 °F). Clemson Extension’s disorders factsheet describes fungal leaf spots with yellowish margins and bacterial spots that are water-soaked.
For spotting that does not match sun, see our Monstera brown spots guide.
How Much Sun Is Too Much?
Sources differ, and the difference is mostly about acclimation.
- NC State Extension’s Monstera profile asks for moderate brightness but not direct sunlight. It adds that variegated cultivars need more sun than green ones.
- UConn says Monstera prefers partial shade with 3–6 hours of direct sun daily.
- UW–Madison recommends bright light in summer and direct sun in winter.
Read together: a Monstera grown up to sun can take some, and winter sun is gentler. A plant that has lived in a dim room cannot jump straight into it.
What to Do Now
- Move it out of the strong light. Pull it back from the window, or use a sheer curtain. Bright, filtered light is the target.
- Check the mix. Maryland links worse scorch to dry soil. Water thoroughly if the top quarter to one-third has dried, as NC State advises.
- Leave mostly green leaves on. Damaged leaves still feed the plant. Remove a leaf only when most of it is brown, cutting at the base of the stalk.
- Do not feed to compensate. Fertilizer cannot repair scorched tissue, and UConn notes Monstera burns easily from high salts.
Acclimate Before the Next Move
Iowa State Extension’s guide to moving plants outdoors says never to move houseplants from indoors into full sun. Start in full shade outside, then introduce more light over 10 to 14 days. Watch for burning or discoloration, which means the light is too intense.
Maryland suggests starting with about 2 hours of full sun a day and increasing it gradually. UW–Madison gives the same warning for Monstera: acclimate gradually or the leaves will sunburn.
Indoors, recheck the spot when the seasons change. The amount of direct sun reaching a window shifts through the year.
Iowa State also advises rinsing foliage, checking for pests and isolating plants for 3 to 4 weeks when they come back inside. Our thrips guide explains what to look for.
Judge Recovery by New Leaves
Burned patches stay. New leaves that open clean show the new position works. If new leaves are small and stretch toward the light, the plant has gone too dark. Iowa State notes leaning or stretching means a brighter spot is needed.
Our houseplant sunburn guide covers acclimation for other plants, and Monstera yellow leaves covers general yellowing.
References
- UConn Home & Garden Education Center: Monstera deliciosa
- UW–Madison Extension: Swiss-Cheese Plant, Monstera deliciosa
- NC State Extension Gardener Plant Toolbox: Monstera deliciosa
- University of Maryland Extension: Excess light on indoor plants
- Iowa State University Extension: Moving indoor plants outside for the summer
- Clemson Cooperative Extension, HGIC 2251: Houseplant Diseases & Disorders
How this guide was put together: UConn Home & Garden Education Center, UW–Madison Extension, NC State Extension, University of Maryland Extension, Iowa State University Extension and Clemson Cooperative Extension guidance.