Pure aluminium sulphate works rapidly to create the hospitable, low-pH environment demanded by acidophilic species.
Swift pH Correction
Vibrant Blue Blooms
Chlorosis Prevention
Hydrolyzes rapidly in damp soils to produce free hydrogen ions, safely lowering substrate pH toward the ideal 4.5 to 5.2 range.
Supplies available trivalent aluminium ions essential for binding delphinidin pigments, transforming pink Hydrangea macrophylla blossoms into deep, saturated blues.
Prevents iron and manganese lockup in calcareous soils, restoring rich chlorophyll synthesis and vigorous dark-green foliage to azaleas and blueberries.
When to Apply
Early Spring Awakening
Pre-Bloom Drenching
Autumn Maintenance
Work gently into topsoil three weeks prior to bud swell. This initial dressing primes the root zone before rapid root growth initiates.
Dissolve in soft rainwater and apply as a root drench when floral clusters form, ensuring maximum aluminium availability during pigment formation.
Apply a mild corrective dosage during late autumn bedding preparation to stabilize overwinter substrate acidity before heavy seasonal rains.
Substrate Balance and Safety
Always test your soil pH before treatment. Dissolve 20 to 30 grams per 10 liters of non-chlorinated water, applying exclusively to pre-moistened soil around the drip line.
Pair with organic bark mulch to insulate delicate root caps and buffer sudden moisture fluctuations throughout dry summer spells.
Explore our complete line of botanical soil amendments, mineral correctors, and organic plant care solutions in the catalogue.