Balled and Burlapped Trees: Use in Landscape Installation

Balled and burlapped (B&B) trees represent one of the dominant transplant methods for large-caliper trees and shrubs in professional landscape installation across the United States. This page covers the definition and mechanics of B&B stock, the installation contexts where it is the standard choice, and the practical decision boundaries that separate it from container-grown and bare-root alternatives. Understanding these boundaries matters because improper handling of B&B material is a leading cause of post-installation tree failure and warranty disputes on commercial and residential projects alike.

Definition and scope

Balled and burlapped stock is nursery-grown plant material that has been field-dug with a ball of native soil retained around the root system, then wrapped in natural or synthetic burlap and secured with wire baskets or twine. The rootball preserves feeder roots and limits transplant shock during the interval between digging and replanting.

American Standard for Nursery Stock (ANSI Z60.1), maintained by AmeriHort (formerly the American Nursery and Landscape Association), governs the minimum rootball diameter and depth for B&B trees at each caliper class. For example, ANSI Z60.1 specifies that a deciduous tree with a 2-inch trunk caliper requires a minimum rootball diameter of 20 inches. These standards are referenced throughout nursery stock types used in landscaping and form the specification baseline for most commercial landscape contracts.

B&B is distinguished from two other primary stock types:

• Container-grown plants are grown and sold in rigid or semi-rigid containers with a contained, fabricated root zone. They are covered in detail at container-grown plants in landscaping.
• Bare-root plants are dug dormant with no soil attached and are typically limited to smaller-caliper trees and shrubs. See bare-root plants for landscaping projects for handling specifics.

B&B is the conventional format for deciduous and evergreen trees above approximately 1.5 inches caliper, where container sizes become impractical and bare-root survival rates decline.

How it works

Field-grown B&B trees are typically grown for 4–15 years in nursery rows before harvest, allowing the root system to develop density and stability within the native soil profile. At harvest, a tree spade machine or hand crew excavates a rootball sized per ANSI Z60.1 minimums, wraps the ball in burlap, and secures it with a galvanized wire basket to maintain structural integrity during transport and handling.

The rootball retains a proportion of the root system sufficient to sustain the tree during the establishment period. However, field digging severs a significant fraction of root mass — research cited by the USDA Forest Service indicates that B&B digging can remove 80–95% of a tree's absorbing root system, which determines the critical importance of planting technique and post-installation irrigation.

Installation sequence for B&B trees involves the following steps:

1. Excavate a planting hole at least 2–3 times the rootball diameter and no deeper than the rootball height.
2. Set the rootball so the root flare sits at or slightly above finish grade — planting too deep is the single most common installation error.
3. Remove or cut back wire basket and burlap after the tree is positioned; synthetic burlap must be fully removed because it does not decompose.
4. Backfill with native soil or a specified amended mix.
5. Mulch the root zone 2–4 inches deep, keeping mulch away from the trunk.
6. Water thoroughly at installation and maintain an irrigation schedule through the first full growing season.

Detailed technique guidance appears at tree planting depth and technique for landscapers and landscape plant installation best practices.

Common scenarios

B&B stock appears across a wide range of landscape installation contexts due to its combination of size availability and field-proven survivability for large specimens.

Commercial site planting is the highest-volume application. Municipalities, developers, and commercial property owners specify B&B trees for streetscapes, parking lot islands, and campus plantings — partly because ANSI Z60.1 compliance is verifiable at delivery, making it enforceable in contract language.

Residential large-caliper installation uses B&B when clients require immediate visual impact from trees in the 2.5–4 inch caliper range, sizes that are rarely available in container format at equivalent quality.

Transplanting mature specimen trees — caliper sizes above 4 inches, sometimes reaching 6–8 inches — relies on large tree spades producing rootballs 60–90 inches in diameter. This overlaps with the practices described at large specimen tree sourcing and installation.

Evergreen screening installations frequently use B&B arborvitae, spruce, and pine because the rootball retains the dense fibrous roots critical to winter survival after transplant. See evergreen screening plants for landscape projects for species selection context.

Seasonal constraints are tighter for B&B than for container stock. B&B trees are optimally transplanted during dormancy (late fall through early spring for deciduous species) or during cooler shoulder seasons for evergreens. Seasonal planting schedules for landscapers maps these windows by region.

Decision boundaries

Choosing B&B over container or bare-root stock involves four primary decision variables:

Caliper and size: Container stock dominates below 1.5 inches caliper; B&B becomes standard above 2 inches caliper where container weights exceed practical handling limits. A 3-inch caliper B&B oak may weigh 600–900 lbs, requiring mechanical equipment regardless of stock type, while a comparable container tree would be economically impractical to produce.

Species root architecture: Deep-taprooted species (oaks, hickories, some pines) tolerate field digging less well than fibrous-rooted species (maples, spruces, arborvitae). Plant sourcing for landscaping contractors addresses species-level sourcing decisions in greater depth.

Site access and timeline: B&B trees require a crane or tree spade for anything above 3-inch caliper, imposing equipment logistics that container stock at smaller sizes avoids. However, container trees large enough to match B&B visual impact are often heavier and more root-bound.

Contract specification compliance: Many public agency contracts reference ANSI Z60.1 explicitly and require B&B for trees above a threshold caliper. Contractors bidding these projects must source B&B stock to remain compliant — nursery availability lists: how landscapers use them covers how to verify ANSI-compliant stock availability before bid submission.

B&B versus container: a direct comparison

References

• ANSI Z60.1 American Standard for Nursery Stock – AmeriHort
• USDA Forest Service – Urban and Community Forestry
• USDA APHIS – Nursery and Seed Program
• USDA Plant Hardiness Zone Map
• International Society of Arboriculture (ISA) – Tree Planting Guidelines