Manutec Soil pH Test Kit
$29.95
$29.95
Test several spots around the garden rather than one, as pH can vary across a single bed.
Soil pH governs which nutrients a plant can take up, and with hydrangeas it also sets flower colour. Acid soil gives blue flowers, near neutral to alkaline gives pink. Test before you start adjusting with lime or a blueing or pinking fertiliser, then again as the season goes on.
Keep out of reach of children. Wash hands after use.