Tree Tech Microinjection Systems

Snipper® Timing Guide

Sweet gum tree bud just starting to break open in early spring, showing the correct stage for Snipper injection

Sweet gum bud starting to break open — this is when to inject Snipper.

When to Inject Snipper in Sweet Gum Trees

Inject Snipper when the sweet gum bud is just starting to break open. The bud scales will be separating and you will see the tip of the bud beginning to open up. Do not wait until the bud is fully open.

Bud Stage Guide

Stage What You See Action
1 — Dormant Buds are small, tight, and closed. Wait
2 — Swelling Buds are getting larger but still closed. Check daily
3 — Just Breaking Open Bud scales separating, tip of bud just starting to open. Inject now
4 — Bud Open Bud is open, flower clusters visible. Too late
5 — Leaf Out Leaves fully out, gum balls forming. Too late

Things to Keep in Mind

Don't go by the calendar. Timing depends on the weather that year. A warm winter can push bud break weeks earlier than normal.

Check the whole tree. Buds on upper branches and south-facing sides tend to open first. Inject when most buds are at Stage 3.

The window is short. Once the buds start opening it can go fast — sometimes just a few days. Check daily once you see swelling.

Photo Examples

The images below show what each stage looks like in the field.

Stage 1 sweet gum dormant bud
Stage 1 — Dormant bud
Stage 2 sweet gum bud swelling
Stage 2 — Bud swelling
Sweet gum bud at Stage 3, just breaking open
Stage 3 — Inject now
Stage 4 sweet gum bud fully open, too late to inject
Stage 4 — Bud open (too late)