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What's It For? - Sulphate of Ammonia

Sulphate of Ammonia is a well-established, quick-acting, growth-promoting fertiliser with a response normally seen in about 10 days. Its main use is to give a rapid boost to established, quick-growing vegetables and salad crops. It is also a very effective spring tonic for shrubs, fruit and spring greens.

Apply it from April to September. Sprinkle it evenly between the rows of vegetables and under the full branch spread of trees, shrubs and fruit bushes (1oz per square yard). Hoe or rake it in and, if dry, water well for maximum benefit. Do not apply as a heap at the base of the stem and shake off any that lodges on the foliage. It may also be dissolved in water (1oz in 2 gallons) and used as a liquid feed. A light sprinkling over the surface of a compost heap each time the height rises by about 6 inches will speed the rate of compost production by 'feeding' the organisms responsible for the degradation process.

The following information has been taken from the packaging of the fertilizers that are sold in the Trading Hut. For more information about fertilizers, their uses and explanation of the labelling see the RHS web site.


Sulphate of Ammonia an inorganic fertilizer with NPK Values 21-0-0.

It is a rapid source of nitrogen for growing plants. Green-leaved vegetables, such as cabbages and lettuces, respond particularly well to the extra nitrogen.

Directions for Use

Scatter 35g/sq.m. (1oz/sq.yd.) around the plants. Lightly fork or hoe in. Repeat once or twice through the growing season.

Preparing Beds and Borders

Scatter 35g/sq.m. (1oz/sq.yd.) evenly over the area. Lightly fork or hoe in.

Application Advice

Use the recommended amount. Apply evenly between the plants, without touching the plant itself. Avoid using on windy days. Water well in after applying. Wash hands after use. To be used only where there is a need. Do not exceed the recommended application rate.


Store in a cool, dry place away from children, pets and foodstuffs.