Standard sized 1.5" rockwool cubes for propagation of seeds and cuttings, fits into the 3" or 4" Grodan rockwool blocks with large holes.
For best results soak these blocks in a young plant nutrient such as Vitalink Plantstart and a good quality root stimulant such as Roots Exceleurator at a pH of between 5.4-5.8.
Available in trays of 77 or boxes with 18 x trays of 77.
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