Hormex rooting hormone powder for cuttings #16 — 1.60% IBA max-strength for hardwood & semi-hardwood

When you need dependable rooting where softer formulations fail, this concentrated powder provides a professional‑grade boost of Indole‑3‑Butyric Acid (IBA) to kickstart root development. Hormex has produced propagation aids for decades; this #16 powder is the highest listed IBA strength in the line, designed for semi‑hardwood and hardwood cuttings, mature ornamental stems, fruiting wood, and other slow‑to‑root species. It works with soil, peat, coco, rockwool, and hydroponic systems and is compatible with Hormex rooting cubes and common propagation workflows.

How quickly will cuttings form roots with Hormex Rooting Hormone #16?

Rooting time depends on species, environment, and cutting condition, but the higher IBA concentration helps shorten the lag phase for tough cuttings. Expect consistent initiation of root primordia sooner than with lower‑strength powders when heat and humidity are managed.

• Speeds root initiation on hardwood and semi‑hardwood stems.
• Works in soil, rockwool, coco, and peat‑based mixes.
• Best results when combined with warm bottom heat and high humidity.
• Pair with Hormex Rooting Cubes for faster stabilization.

What’s the correct way to use this max‑strength rooting powder?

Follow standard propagation technique: take a healthy 3–8 inch cutting at a 45° angle below a node, optionally pre‑dip in clean water or a Hormex liquid, then tap the basal end into the powder so a thin, even coating adheres. Plant into your chosen medium and maintain gentle warmth and humidity until roots establish.

• Cut stems 3–8" at 45° below a node for best uptake.
• Lightly coat the basal end; avoid overpacking with powder.
• Use consistent moisture, bottom heat (if possible), and high humidity domes.
• Monitor for rot—ensure good drainage and air circulation after rooting.

Which plant types benefit most from this 1.60% IBA powder?

This strength is formulated for species that are slow or stubborn to root: mature hardwoods, deciduous and evergreen ornamentals, some fruit trees, and medicinal or rare cultivars where clonal success matters. For very soft, recently flushed cuttings, choose a lower IBA concentration in the Hormex range.

• Hardwood cuttings from trees and shrubs.
• Ornamental varieties and rare or valuable cultivars.
• Fruiting wood that resists rooting with weaker formulas.
• Professional cloning setups and hobbyists propagating precious stock.

Can I use it with hydroponic systems and rooting media?

Yes — the powder adheres to cutting bases and performs well whether you plant into rockwool, coco, peat moss, or traditional potting mixes. It’s compatible with both soil‑based and hydroponic propagation, serving as a versatile stimulant for many setups.

• Effective in rockwool cubes for hydroponic clones.
• Suitable for coco, peat, and porous potting mixes.
• Pairs well with humidity domes and heated benches.
• Not a fertilizer—use alongside proper nutrient schedules once roots form.

Who is this for: Hormex Rooting Hormone #16 is ideal for experienced gardeners, nurseries, and propagators who work with hardwood or otherwise difficult cuttings and need a concentrated IBA powder to improve success rates. If you regularly clone shrubs, trees, rare ornamentals, or fruiting wood and are comfortable managing propagation environment controls (heat, humidity, sterile technique), this max‑strength formula gives you a reliable, industry‑proven option to increase rooting consistency.

Ingredients

IBA