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The addition of Sulphate of Potash at pruning, early Spring and Autumn, will thicken cell walls and strengthen stems of the plant to help guard against Black Spot. Sulphate of Potash will also intensify the perfume and colour of the flowers.
Benefits of Sulphate Of Potash:
How much to use: Apply at the rate of 10g per square metre.
Note – One adult handful equals approximately 50g.
Ensure the surface is already damp. Spread evenly over the surface and rake into approximately 5cm of soil. Water in well immediately after spreading
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56 Kingston Rd,
Underwood QLD 4119
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Public Holidays 8am-2pm