Contact Clippings

  • Email Grass Clippings - Email the Grass Clippings Team

    Telephone: 0330 321 3134

    Fax: 0330 321 3135

    GMT Office Hours Only

Our Details

Our Partners

« How to measure your lawn | Main | Lawn Advice at your fingertips »

Control Lawn Moss

Grassclippings - Soluble Iron - The Lawn ShopMoss control and then Moss removal in lawns is a practice normally performed in the spring and autumn. 

The weather is still against us but if it cheers up and warms up then you could commence with some winter moss control.

If the grass plants activity has thinned or weakened over the past 12 months, now is the time to start Moss control and eradication and some mechanical operations just ahead of over seeding the lawn to turn the tide on the moss and re populate with existing or new grasses whilst the soil is still warm. Moss is traditionally controlled and killed using Soluble Iron.

This is the constituent of lawn feeds that will always turn the moss black just ahead of scarification to remove it some two weeks following application.  There is never a great quantity of Sulphate of Iron or Ferrous Sulphate active ingredient in the well known brand of autumn and spring lawn fertiliser and feeds.  For better moss control results, it is possible to purchase straight Sulphate of Iron in a 10 Kg tub, sufficient to treat up to 10,000 square metres that is mixed with water and will easily go through a Knapsack.  It will be almost 95% Sulphate of Iron and will literally turn the moss black in front of your eyes, also adding some much needed colour to the lawn in the early spring.

The soluble Sulphate of Iron has a low cost per square metre and easy to apply as a foliar spray. It dissolves in cold water easily without the need for constant agitation. If your lawn has a moss problem and you have the method and kit available to apply a foliar iron and moss control product, then this is the one you need to use.  Apply about 1.3Kg in 15lts of water per 700 sqm to blacken moss or half this to provide a rapid green up only. You can buy Soluble Iron for moss control or greening up lawns in a handy 10 Kg bucket.

Here is some background information on this troublesome plant ...

Mosses are plants, comparatively simple in structure and function and, with the Liverworts, comprise the Bryophyta family – one of the least complicated groups of the plant kingdom.

Mosses are found in very many situations, for example, on stones, tree trunks and turf. If you have moss on your lawns then it is primarily an indicator that you are not looking after the millions of individual grass plants that make up your lawn.

Where moss is a persistent problem, it often indicates some fundamental weakness in the turf and treatment with a moss killer is often only a short-term answer.

From the ‘Causes of Moss Invasion list’, it should be obvious that persistent moss problems are an indication of some fundamental weakness in a turf area. The presence of significant quantities of moss for long periods each year suggests that the turf may be excessively acid, lacking in fertilizer dressings or excessively wet with a small percentage of actual grass content.

Correcting these deficiencies will result in stronger grass growth and the moss then tends to disappear naturally because of the increased competition presented by healthy grasses.

Simple treatment with a moss-killing chemical is, therefore, often not the complete answer to moss trouble. Cultural control should always be considered first. Prevention is always better than cure.

A lawn should have nothing in it except good dense healthy desirable grasses – neither weeds nor moss.  This autumn is the time to get to  grips with your moss ridden lawn and do something about it, be cruel to be kind should you wish for a better lawn next spring.  The moss is only there because the lawn is being neglected year on year and the grasses have thinned out to such a point that you now have more moss than grass!  Left in it's present state, without any renovation programme to restore the grass population into the surface and you will have a mossy lawn next year too - without doubt.

Causes of Moss Invasion

1. A moist turf – poor drainage encourages the fern-like and tufted mosses
2. A soft, spongy sward with a thick fibre layer
3. A very dry soil, e.g. over drains, on mounds and ridges. Inadequate watering or
   over-drainage encourages the upright type
4. Bare areas remaining after weeds have died
5. Cutting the grass too low
6. Diseased turf
7. Dry acid soil
8. Low fertility, e.g. deficiencies of plant nutrients
9. In appropriate maintenance
10. Inadequate or poor grass cover and growth
11. Low nutrient status
12. Neglect
13. Over-consolidation of the soil - compaction
14. Poor surface levels which may lead to scalping
15. Shade from trees, hedges and buildings and topography – north facing lawn
16. Turf that is not growing under ideal growing conditions
17. Weak and sparse turf
18. Compaction & over consolidation
19. Prolonged periods of wet weather
20. Time of year – autumn, winter and spring

Purchase tubs of Soluble Iron

Purchase Earthworm Cast Deterrent


Feed You can follow this conversation by subscribing to the comment feed for this post.

The comments to this entry are closed.

Lawn Technical Pages

Common Lawn Problems

Buy Lawn Products

Other Gardening Sites

Weed Control

  • Weed Free Contract Pesticide Application Services and Weed Control in Amenity Turf

    The Lawn Company Professional Lawn Care Treatments, Lawn Care Products and Advice

Turf Industry Sites


  • Metcheck - detailed UK weather including seven day forecasts

    Met Office - UK Meteorological services