Lime & Sulphur Treatments
What is pH?
- What is pH?
The acidity or alkalinity of a substance is measured in pH units, a scale running from 0 to 14. A pH of 7 is neutral. As numbers decrease from 7, the acidity gets higher. As numbers increase from 7 so does the alkalinity. Soils generally range from an extremely acidic pH of 3 to a very alkaline pH of 10. This range is a result of many factors, including a soil’s parent material and the amount of yearly rainfall an area receives. Most cultivated plants enjoy slightly acidic conditions with a pH of about 6.5 such as St Augustine, Bermuda, Zoysia, and Centipede grass. Azalea and rhododendron are among the plants that demand a very acidic pH of 4.5 to 5.5.
- What does pH do? Soil pH has an indirect yet far-reaching effects on plants. Plant nutrients become available or unavailable according to the soil’s pH level. Yellowing between the veins of young leaves indicates an iron deficiency — a condition arising not from a lack of iron in the soil but from insufficient soil acidity to put iron into a form that a plant can absorb. Most plants thrive in slightly acidic soil because that pH affords them good access to all nutrients.
The darker side of soil pH is plant poisoning. Too low (acidic) a pH level can render the plant nutrient manganese available at toxic levels; St Augustine grass are particularly sensitive to this, showing their discomfort with yellowed, brown-flecked, or dead blades.
Better Home and Lawn will check the pH of your soil and advise if lime or sulphur is needed to adjust the pH accordingly. Different soil structures have various needs of lime or sulphur, therefore, we do not build the price of treatment due to the fact that there is no way to predict the amount or frequency of product needed.