Picking the right slab for your vertical growing system is essential if you want to succeed. We highly recommend the Cultilene Maxxima Rockwool Grow Slab because its structure is perfectly suited to vertical applications. Whereas Grodan Slabs are ideal for normal horizontal growing (as the fibres are tightly packed horizontally), the Cultilene Slabs have less linear fibre structure which ensures more even nutrient distribution when drip feeding vertically.
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