Plant Silicon for Strong Stems – Intense Nutrients Silicon Ultra

Silicon Ultra – Pro Series Silicon for Stronger Stems, Tougher Leaves and Resilient Plants

Silicon is the most overlooked element in horticulture, partly because it isn't in the famous NPK trio and partly because it does its best work quietly. It reinforces cell walls from the inside, so stems stand straighter, leaves hold firmer and plants shrug off stresses that would flatten weaker specimens. Think of it as the steel in reinforced concrete. Intense Nutrients Silicon Ultra, part of the top-tier Pro Series, delivers that silicon in a highly bioavailable form, so the plant can actually use it.

Beyond structure, silicon supports nutrient uptake and metabolism, leading to better nutrient efficiency and overall vigour. And at just 0.1–0.2ml per litre, one bottle goes an extraordinarily long way.

Perfect For

Tall, top-heavy plants like tomatoes, sunflowers, chillies and peppers; large-leaved houseplants and aroids that flop under their own weight; plants grown under strong LEDs or in heat; cuttings and young plants that need sturdier stems; and any soil, coco or hydro setup.

Key Benefits

• Highly bioavailable silicon for maximum uptake
• Strengthens cell walls for sturdier stems and tougher leaves
• Helps plants cope with heat, light and environmental stress
• Improves nutrient efficiency and overall vigour
• Ultra-concentrated: 0.1–0.2ml per litre

How to Use

Add 0.1–0.2ml per litre of water. Silicon should go into the water first, before any other nutrients, then mix thoroughly before adding the rest of your feed.

🌿 Rose's Pro-Tip: at 0.1ml per litre, a 10-litre watering can needs just one millilitre. Keep a dedicated syringe for Silicon Ultra so you never overshoot.

Sizes

250ml and 1 Litre.

Black Flag Horticulture Ltd, Coventry – proud UK stockists of Intense Nutrients.