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General Hydroponics Armor Si (0-0-4) is an all-purpose silica supplement that helps plants achieve strong stem and branch structure and foliar development. A healthy, vigorous plant boosts stress tolerance, light absorption, and flower production. Think of Armor Si as a supplement that supports the foundation of the plant, from leaves to stems to flowers. Armor Si, works with Rockwool, potting mix, coco coir, peat mix, and hydroponics.
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🇺🇸 Ship from USA · On Agora since 2026
$19.95