They can quickly establish and multiply under conditions of high humidity, high soil moisture, low pH and little plant competition, especially where the soil is compacted. They are found mainly infesting pot plants but can often be found in borders where the soil has gradually become impoverished.

Cultural control

With pots and containers it is a simple task periodically to remove the liverwort and top up with fresh compost or add a top dressing of coarse gravel.

In the garden the soil pH should be kept close to neutral (pH 7) which is suitable for most plants other than rhododendrons and similar lime-haters. Borders and other cultivated areas should be well stocked with plants and regularly hoed and raked in order to maintain a rough and well-drained surface. Where soil compacts readily after rain the organic content of the soil can be improved by digging in or mulching with coarser materials such as well-rotted farmyard manure, garden compost or composted bark.

Chemical control

In lawns
If liverwort is present on lawns it is likely that the lawn is badly compacted and unless this problem is addressed the liverwort will simply re-grow. Temporary control, however, can be achieved by dabbing the liverwort with malt vinegar will kill it, and any spores in the area, however you should bear in mind that vinegar is acidic, so don't overdo it.

In borders
Products based on fatty acids should be used, and with care around garden plants as any chemical applied to the foliage of ornamental plants will cause scorching.