Will the brown spots go away?

No, the spots are scars and will remain on the plant. As the cactus grows, they will move further down the stem.

Are these spots caused by bugs?

Sometimes pests like scale can look like brown spots. Use a magnifying glass to see if the spots can be scraped off easily.

Peruvian torch cactus: spots, causes and fixes

Check these first

Check if the spots are soft or dry and hard.
Look for signs of pests near the spots.
Consider if you recently moved the plant to a brighter location.

Likely causes

Fungal infection
Most likely
How to tell: Small, sunken, or spreading brown spots that appear after periods of high humidity or poor airflow.
What to do: Improve air circulation around the plant. If the spots spread, treat the area with a copper based fungicide.
Sunburn
Possible
How to tell: Hard, dry, light brown patches that appear suddenly after moving the plant into direct sun.
What to do: Gradually acclimate your cactus to brighter light over 2 to 3 weeks. The damage is permanent, but the plant will continue to grow.

Leaf spots on other plants

Find out what's wrong with your peruvian torch cactus

The list above covers the usual causes. Pocket Botanist looks at a photo of your actual plant and tells you the likely cause, how serious it is, and what to try first. Identification and a health check are free.

When to worry

If the spots are soft, oozing, or spreading rapidly, it is a sign of a serious infection. Dry, hard spots are usually just cosmetic scars.

Stopping it coming back

Keep the plant dry and ensure it has plenty of fresh air. Avoid splashing water directly onto the stem when watering.

Peruvian torch cactus: spots? Check yours with a photo

Every plant is a little different. Take a photo of your peruvian torch cactus and Pocket Botanist tells you which cause is most likely, how serious it is, and what to try first. A few checks a day are free. Save the plant and you get care reminders timed for it.

Get the app · Or check it from a photo now, free

Questions people ask

Will the brown spots go away?: No, the spots are scars and will remain on the plant. As the cactus grows, they will move further down the stem.
Are these spots caused by bugs?: Sometimes pests like scale can look like brown spots. Use a magnifying glass to see if the spots can be scraped off easily.

Why are there brown spots on my Peruvian torch cactus?