Rooting hormones are auxin compounds, mainly IBA and NAA, that trigger cuttings to grow roots faster and more reliably. You apply gel, powder, or liquid to a freshly cut stem before setting it in your medium. Healthy cuttings can root on their own, but hormones raise your success rate.
What auxins do to a cutting
Auxins are natural plant hormones that direct root formation. Two synthetic versions dominate rooting products: indole-3-butyric acid (IBA) and naphthaleneacetic acid (NAA). When you dip the trimmed stem, these compounds concentrate at the wound and signal the stem to push out new roots from that point.
A cannabis cutting already makes some auxin on its own. The store-bought version simply adds a stronger, steadier dose right where you need it, which shortens the wait and cuts down on cuttings that stall and rot.
Gel, powder, liquid, or nothing
Each format works; they differ in convenience and control. Gel clings well and seals the cut, so it stays popular with home growers. Powder is cheap and shelf-stable but coats unevenly. Liquid concentrates give the most control over strength once you learn to mix them. Water-only cloning skips hormones entirely and still works with vigorous stock.
There is no single right answer. Pick the format that matches your workflow and your comfort with mixing. Our mother plant guide covers taking strong cuttings in the first place.
How to apply it correctly
Cut a healthy shoot at a 45 degree angle with a clean, sterile blade. Work fast so the stem does not dry out. Dip the bottom inch into your chosen product, coating the fresh wound and just above it. Tap off any excess, then set the cutting straight into moist medium without smearing the coating off.
Keep humidity high with a dome and avoid strong light for the first few days. From here, standard clone care takes over. Follow our clone care guide through the rooting window.
Comparing your options
The table below sums up the honest trade-offs between the common approaches so you can choose with clear eyes.
| Method | Ease of use | Control over dose | Best for |
|---|---|---|---|
| Gel | Very easy, sticks well | Fixed strength | Home growers, most cuttings |
| Powder | Easy, can coat unevenly | Fixed, long shelf life | Budget batches |
| Liquid | Needs mixing | High, adjustable | Large or fussy runs |
| Water only | Simplest, no product | None | Vigorous, easy-rooting stock |
Do you really need rooting hormone?
Honestly, no, not always. A healthy cutting from a well-fed mother often roots fine in plain water or moist medium. Hormones are an aid, not a requirement. What they buy you is speed and consistency, which matter most when you clone in volume or work with slower, woodier cuts.
We run a Colorado nursery and clone at scale, so a steady rooting rate matters to us. For a grower taking a handful of cuts off a strong plant, plain technique often gets there too. If cuttings keep failing, look at the mother's health and your humidity and temperature before blaming the hormone.
Frequently asked questions
Can cannabis clones root without rooting hormone?
Yes. Vigorous cuttings from a healthy mother root readily in plain water or moist medium. Hormone products speed the process and lift your success rate, especially on tougher stems, but they are not mandatory. Many growers clone with nothing but clean technique and good humidity.
Is gel or powder better for cuttings?
Gel is more forgiving because it clings to the stem and seals the wound, which suits most home growers. Powder is cheaper and stores longer but can coat unevenly. Both root cuttings well, so the choice comes down to convenience and what you already have on the shelf.
What are IBA and NAA?
They are the two synthetic auxins in most rooting products. IBA is indole-3-butyric acid and NAA is naphthaleneacetic acid. Both mimic the plant's own root-forming hormone, concentrating at the cut to push out new roots. Many products blend the two for a broader effect.
Can you use too much rooting hormone?
Yes. Overdosing can burn the stem base and actually slow or stop rooting. More is not better here. Follow the label, dip only the bottom inch, and tap off the excess. A light, even coat on the fresh wound outperforms a heavy glob every time.
Strong roots start with strong genetics. We ship freshly rooted, female-guaranteed, HLVd-tested plants that already cleared the hardest step for you. Browse our cannabis clones for sale and plant with confidence.