Garden Help
Diagnose plant problems and treat garden pests


Get Gardening Help!

Home > Question >

What is the white layer on the compost around my pot plants?


Our Advice:

A mould that feeds on fertiliser residue in the compost. It is worse if you water with hard tap water and liquid feed your plants. Replace the top layer of compost with new, stand the pots in saucers and water from below to keep the surface of the compost drier.

Gardening Expert:
Steve Bradley

Here are some related questions:



Not what you are looking for?


If you can't find what you are looking for on the website then you can ask one of our experts. To get in touch with us Click Here

We will try to get back to you with an answer as soon as we can.


Here is some more information for you:


Did you find this answer useful? Subscribe to our newsletter for gardeing news, projects, special offers and competitions.

Ask another gardening question:




Learn More About Pests and Diseases


Angle shades moth
Anthracnose
Box blight
Box tree caterpillar
Canker - Bacterial
Canker - Bleeding
Canker - Fungal
Capsids
Centipedes
Chafer grubs
Coral spot
Cutworms
Earthworms
Earwigs
Eelworms (leaf & stem)
Eelworms (soil-borne)
Froghopper
Fuchsia gall mite
Garden Ants
Grey mould
Honey fungus
Leaf cutter bees
Leaf Rolling Caterpillars
Leaf spots - Fungal
Leatherjacket
Lily beetle
Mealy bugs
Mildew - Downy
Mildew - Powdery
Millipedes
Pear midge
Phytophthora root rot
Rose Black spot
Rusts
Sawfly - Berberis
Sawfly - Gooseberry
Scale insects
Sciarid flies
Slugs
Snails
Sooty moulds
Thrips
Vine weevil
Whitefly
Wireworms
Woodlice
Woolly aphid

Latest Gardening & Horticultural Careers


Explore Gardens from Around the World


Dubai Miracle Garden
Dubai, United Arab Emirates

Saint Petersburg Botanical Garden
Saint Petersburg, Russia

Royal Botanic Gardens, Kew
Richmond, United Kingdom

Rio de Janeiro Botanical Gardens
Rio de Janeiro, Brazil

Gardens of Versailles
Versailles, France



Watch a Video!

How to Take Care of Spring Flowering Bulbs
How to Take Care of Spring Flowering Bulbs
Why are there brown / black marks on my Hellebores?
Why are there brown / black marks on my Hellebores?
Why are my apples rotting on the branch?
Why are my apples rotting on the branch?
Effective Watering
Effective Watering
5 Essential Spring Bulb Tips in 1 minute
5 Essential Spring Bulb Tips in 1 minute
How to Grow Perennial Scabius
How to Grow Perennial Scabius