Most B&B tree deaths happen in the first 12 months and trace back to one mistake: planting too deep. Here's how to set the root flare, remove burlap, and give the tree a real chance.
A 3-inch caliper live oak costs $400–$800 depending on the nursery. When that tree dies two years after install, the client doesn't blame their own watering habits — they blame you. The guarantee conversation is uncomfortable, the replacement tree is expensive, and you just worked for free on a job you already finished. Nail the planting the first time.
Finding the Root Flare Before You Dig
The root flare is the point where the trunk begins to widen as it transitions into the root system. It should be at or slightly above grade — never buried. On nursery-grown B&B trees, the root flare is often buried under 2–4 inches of soil added during growing and transport. Before you dig the hole, expose the root flare so you know exactly where it is.
Use a hand trowel to scrape soil away from the top of the ball, working from the trunk outward. Stop when you hit the first major lateral root. That point is your reference depth. The top of the root ball when you set the tree in the hole should put this reference point at grade level.
Hole Sizing: Width and Depth
Dig the hole 3 times the diameter of the root ball and no deeper than the root ball's height. The width rule matters because it loosens the surrounding soil so new roots can penetrate. Roots can't punch through dense undisturbed soil at the edge of a narrow hole — they circle back and eventually girdle the trunk.
The depth rule is critical. Never dig deeper than the root ball height. The bottom of the hole should be undisturbed, firm soil. If you dig too deep and add backfill under the ball, the tree will settle as the loose soil compresses, burying the root flare. This kills more B&B trees than any other single mistake.
For a 24-inch diameter root ball (typical for a 2-inch caliper tree), dig a hole 72 inches wide and exactly as deep as the ball measures from bottom to the root flare. Measure the ball with a tape before you touch a shovel.
Setting the Tree and Removing Burlap
Lower the tree into the hole using a tree spade, skid steer, or crew members with rope and hand trucks. Never lift a B&B tree by the trunk — you'll break roots and damage the flare. Set it by the ball.
Check depth and orientation before touching any burlap. Once you're happy with the position, remove the twine from the trunk — this is non-negotiable. Twine left around the base girdles the tree as the trunk expands. Cut it completely and pull it free.
For natural burlap: fold it back and cut away as much as possible from the top half of the ball. Leave the bottom — you'll disturb the root ball trying to pull it from underneath and that does more harm than leaving natural burlap that will decompose. For synthetic burlap (it's shiny and doesn't tear): remove all of it. Synthetic burlap does not decompose and will strangle roots.
Remove the wire basket if present. Use bolt cutters to cut the basket into sections and pull it out in pieces. Wire baskets can restrict root growth as the tree matures. Some arborists leave them, but removing them is the correct practice on quality installs.
"Two things kill most B&B trees: buried root flares and twine left on the trunk. Both take five minutes to fix at install time. Neither is fixable two years later."
Backfill, Watering Basin, and Mulch
Backfill with the same native soil you removed. Do not amend heavily with compost or potting mix — the roots will stay in the enriched backfill zone and never explore the surrounding native soil. A small amount of compost (10–20% by volume) is acceptable but not more.
Fill in thirds. Add one-third of the backfill, tamp lightly with your foot (not a tamper — you'll compact too hard), water that layer, then repeat. Watering each layer removes air pockets without mechanical compaction.
Build a 3–4 inch high berm ring at the outer edge of the root ball to create a watering basin. This concentrates irrigation water over the root zone during the establishment period. Do not build the berm against the trunk.
Apply 3–4 inches of hardwood mulch within the berm. Keep mulch 3 inches away from the trunk — volcano mulching (piling mulch against the trunk) causes bark rot and is one of the most common reasons trees fail in 3–5 years. The mulch ring should look like a donut, not a volcano.
Staking and First-Year Watering
Stake only if necessary — trees that can stand without stakes establish stronger root systems because they respond to movement by developing caliper wood. If staking is needed, use two stakes at 45° to the prevailing wind direction with flexible tree tie (not wire, not rope). Ties should allow 1–2 inches of movement. Remove stakes after 12 months.
Watering schedule for the first season in Central Texas:
- Weeks 1–2: Water deeply every other day. Fill the basin slowly — slow flooding gets water deep. Target 10–15 gallons per watering for a 2-inch caliper tree.
- Months 1–3: Water twice per week during summer. Once per week during mild weather.
- Months 4–12: Weekly watering minimum. More during heat events over 100°F.
A drip ring at the outer edge of the root ball (not at the trunk) is the most effective irrigation method for tree establishment. Set it on a separate zone from the surrounding turf or beds so watering frequency can be adjusted independently.
Frequently Asked Questions
How deep should a B&B tree be planted?
The root flare should sit at or slightly above grade. The hole should be exactly as deep as the root ball height — no deeper. Measure the ball from bottom to the root flare, then dig that exact depth.
Should you remove the burlap when planting a B&B tree?
Remove as much as possible from the top half of the ball. Natural burlap on the bottom can stay — it decomposes. Remove all synthetic (shiny) burlap completely. Always remove the wire basket and all trunk twine.
How wide should the planting hole be for a B&B tree?
Three times the diameter of the root ball. For a 24-inch ball, that's a 72-inch wide hole. Wide holes matter more than deep holes — roots expand laterally and need loosened soil to colonize.
Should I amend the backfill when planting a tree?
Minimal amendment — 10–20% compost at most. Heavy amendment creates a pocket of rich soil that roots won't leave, limiting the tree's ability to establish in the surrounding native soil. Use native soil as the primary backfill.
How do you stake a B&B tree correctly?
Two stakes at 45° angles to prevailing wind, connected with flexible tree strapping that allows 1–2 inches of trunk movement. Remove at 12 months. Never use wire or rigid ties directly against the trunk.
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Edgar Galindo
Co-founder, Ledge
Edgar built Ledge while running a landscape construction company in Central Texas. He writes about installation techniques, estimating, and building a profitable field operation.