Can I save a leaf that has spots?

It is better to remove it. Once a leaf is infected with fungus, it will not recover and can spread spores to healthy parts of the plant.

Will these spots kill my plant?

Usually no, unless the infection is severe. If you catch it early and improve the airflow, the plant will continue to grow.

Redroot pigweed: spots, causes and fixes

Check these first

Inspect the undersides of the leaves for fungal growth.
Check the soil moisture level with your finger.
Clear away debris from around the base of the plant.

Likely causes

Fungal Leaf Spot
Most likely
How to tell: You will see dark, irregular patches on the leaves that might have a yellow halo. These spots often appear after long periods of rain or high humidity.
What to do: Remove the affected leaves immediately to stop the spread. Ensure there is plenty of airflow around the plant by thinning out dense patches. Avoid overhead watering to keep the foliage dry.
Overwatering
Possible
How to tell: The soil stays soggy for days and the spots appear alongside general wilting. Roots may start to smell sour if the soil is constantly waterlogged.
What to do: Let the top inch of soil dry out before watering again. Adjust your schedule to every 5 to 7 days depending on the heat. Improve soil drainage by adding organic matter if the ground is heavy clay.

Leaf spots on other plants

Find out what's wrong with your redroot pigweed

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

Worry if the spots are spreading rapidly to the stems or if the whole plant begins to collapse. A few spots on older lower leaves are usually just a sign of aging.

Stopping it coming back

Space your plants out to allow for good air circulation and always water at the base rather than over the leaves.

Redroot pigweed: spots? Check yours with a photo

Every plant is a little different. Take a photo of your redroot pigweed 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

Can I save a leaf that has spots?: It is better to remove it. Once a leaf is infected with fungus, it will not recover and can spread spores to healthy parts of the plant.
Will these spots kill my plant?: Usually no, unless the infection is severe. If you catch it early and improve the airflow, the plant will continue to grow.

Guides to these causes

Leaf Spot

Why are there dark spots on my redroot pigweed leaves?