Showing 0 products
Frequently Asked Questions
Is lime a fertiliser?
No - it adds almost no nutrient value and changes soil pH instead.
pH determines whether the nutrients already present are available to plants.
An acidic soil locks up phosphorus and several micronutrients.
A lawn can show every symptom of starvation in a well-fertilised soil.
Applying more fertiliser to that situation produces very little.
Correcting the pH releases what is already in the ground.
How do I know whether lime is needed?
By testing the soil - it cannot be judged by eye, and getting it wrong makes things worse.
Applying lime to an already alkaline soil worsens the problem and is difficult to reverse.
Tests are inexpensive and available as kits or laboratory services.
Laboratory tests also report nutrient levels, which informs the whole programme.
Symptoms of pH lockup look identical to symptoms of deficiency.
Testing before the first application and retesting periodically is the sensible routine.
What lowers pH rather than raising it?
Sulphur and acidifying products, used on alkaline soils.
That matters for acid-loving plants that will not thrive otherwise.
It also affects iron availability, which drives turf colour.
Elemental sulphur works slowly through microbial conversion.
Acidifying fertilisers achieve a gradual shift as a side effect of feeding.
Large pH reductions on naturally alkaline soils are difficult and often not worth attempting.
Which lime product should be used?
Ground limestone for a slow steady correction, prilled for even spreading, hydrated only with care.
Ground limestone dissolves over months and is the general-purpose choice.
Dolomitic lime adds magnesium, which suits soils deficient in it.
Granular and prilled products spread evenly and act somewhat faster.
Hydrated lime acts quickly, is caustic and can scorch turf.
Fineness of grind affects speed of action as much as the chemistry does.
How much should be applied at once?
A moderate application, then a retest after several months, rather than a single large correction.
Over-liming is easy to do and slow to undo.
The products are cheap relative to the effect, so there is no saving in overdoing it.
Soil type affects how much is needed for a given change - clay soils resist pH change more than sandy ones.
Test recommendations state rates for the soil type.
Splitting a large correction across two seasons is normal practice.
Does acidity affect thatch?
Yes - acidic soils suppress the biology that breaks thatch down, so it accumulates.
Thatch build-up is often treated mechanically without addressing the cause.
Correcting pH restores the microbial activity that decomposes it.
That is a slow process rather than a quick fix.
Scarifying and aerating remain necessary where thatch is already thick.
Addressing both together produces a lasting result where either alone does not.
What precautions does handling need?
Lime is dusty, irritant and caustic in some forms - eye and respiratory protection is sensible.
Hydrated lime in particular is caustic to skin and eyes.
Powdered products create dust that is easily inhaled during spreading.
Wind carries it onto neighbouring areas and vehicles.
Prilled and granular forms greatly reduce the dust problem.
Spreaders should be washed after use, since lime is corrosive to equipment.