How to Tap Maple Trees: Size, Timing and Drilling
How to tap maple trees: which trees qualify, how many taps, when sap runs, drilling a 5/16 inch hole and collecting sap, from University of Maine Extension.
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Tap maples at least 10 inches across at 4 1/2 feet, one tap per tree up to 18 inches, when days warm to about 40 degrees F after freezing nights. Drill a 5/16 inch hole 1.5 to 2 inches deep, level, tap in the spout, hang a covered bucket or run tubing, and boil the sap soon. All figures from University of Maine Extension's Bulletin 7036.
Which trees
| Diameter at 4.5 ft | Taps |
|---|---|
| Under 10 in | Do not tap |
| 10 to 18 in | 1 |
| 18 to 25 in | 1, a second may be added |
| Over 25 in | Up to 3, very healthy trees only |
When
Sap runs on cycles of about 40 degrees F or warmer during the day and freezing at night, typically mid-February to early April in southern Maine and mid-March to late April in northern Maine.
How
- Use a clean, sharp 5/16 inch bit.
- Drill 1.5 to 2 inches deep, level and horizontal.
- Tap the spout in gently; do not split the bark.
- Hang a covered bucket, sap bag, or run tubing to a food-grade bucket.
- Collect often; keep sap cold and boil it as soon as you can.
University of Maine says 7/16 inch spouts cause more damage than the newer 5/16 inch spouts.
Kits: tapping kits. Next: how to make maple syrup, sap calculator.
Frequently asked questions
How big does a maple have to be to tap?
At least 10 inches in diameter at 4 1/2 feet above the ground.
How many taps can one maple take?
One up to 18 inches, possibly two from 18 to 25, up to three over 25 inches on very healthy trees.
How deep do you drill to tap a maple?
1.5 to 2 inches with a 5/16 inch bit, level. Drill level and horizontal with no upward angle, per the same bulletin.
When is the best time to tap maple trees?
When days reach about 40 degrees F or warmer and nights freeze, mid-February to April in Maine.
Can you tap red or silver maples?
Many people do; sugar maples usually have the sweetest sap. Measure each tree's Brix to see.
Sources
- Bulletin #7036, How to Tap Maple Trees and Make Maple Syrup, University of Maine Cooperative Extension
- Maple Sap Collection and Sap Processing Systems (Utah Forest Facts 044), Utah State University Extension
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Best Maple Tree Tapping Kits for Beginners (2026)
5/16 inch spouts, drops and filters to tap your first maples.
How to Make Maple Syrup at Home: Boiling and Finishing
From buckets of sap to bottled syrup, with the finishing temperature that matters.