Install Landscape Fabric and Mulch Correctly

Job Overview

This chapter qualifies you to decide whether landscape fabric is appropriate for a specific planting bed, install it correctly where justified, and apply a uniform mulch layer over the bed while protecting plant crowns, trunks, stems, soil health, drainage, and building clearances. The finished work product is one bed with fabric installed only where the design justifies it, and mulch applied at the specified depth across the full bed area.

You will review the bed's plant type, weed pressure, soil-amendment needs, and future maintenance requirements; decide whether fabric belongs in this bed at all; install fabric with correct orientation, overlap, and fastening where it is used; cut controlled openings for existing or planned plants; install drip tubing according to the approved irrigation detail; calculate and place mulch at the correct depth; and inspect the finished bed for fabric exposure, mulch depth, plant clearances, and drainage.

This chapter builds directly on the bed shaping in Chapter 5 and the edging and soil preparation in Chapter 6. It also coordinates with the drip-irrigation installation taught in Chapter 14 where the bed design calls for below-grade or above-fabric tubing. The fabric and mulch installed here become the surface every planting chapter from Chapter 8 through Chapter 10 must work around without disturbing.

Skills You Will Demonstrate

• LS-037 — Select fabric where appropriate, based on plant type, weed pressure, soil-amendment needs, and future maintenance.
• LS-038 — Install fabric around existing or planned plants without wrapping trunks or stems.
• LS-039 — Overlap fabric seams by the approved amount and in the drainage-compatible direction.
• LS-040 — Cut planting openings that fit existing or planned plants without excess exposed fabric.
• LS-041 — Apply mulch at the proper depth without burying crowns, trunks, or building components.
• LS-042 — Inspect mulch coverage, fabric exposure, seams, fasteners, and clearances.

Where This Skill Fits

This chapter depends on the cleared and graded bed from Chapters 4 and 5, the prepared soil from Chapter 3, and the edged bed boundary from Chapter 6. It also depends on the sun, shade, drainage, and irrigation findings recorded on the Landscape Readiness Worksheet in Chapter 1.

The fabric-and-mulch decision made here directly constrains every planting chapter that follows. A bed with fabric installed where it should not have been used will restrict the perennial division and groundcover spread taught in Chapter 10, and will interfere with the tree-root access needed by Chapter 9. The mulch depth and clearance standards set here also carry into the fertilizing and mulch-maintenance work in Chapter 18 and the mulch-refresh work in the Chapter 19 restoration.

Scope and Intended Use

This chapter covers:

• reviewing bed use, plant type, weed pressure, soil-amendment needs, fabric product, mulch, irrigation, and future maintenance before selecting fabric
• deciding whether fabric is appropriate for the specific bed, and declining to use fabric where it is not justified
• confirming weed removal, soil preparation, grading, and irrigation trenching are complete before fabric or mulch is placed
• installing fabric with correct orientation, seam overlap, and fastening
• cutting controlled openings for existing or planned plants without wrapping trunks or stems
• installing drip tubing above or below fabric according to the approved irrigation detail
• calculating and placing mulch at the specified depth without burying crowns, trunks, or building components
• inspecting fabric exposure, seams, fasteners, mulch depth, plant clearances, and drainage

This chapter does not authorize the learner to:

• install fabric in a bed requiring frequent division, soil amendment, groundcover spread, tree-root access, or natural reseeding unless the approved bed design specifies fabric for that bed
• begin fabric or mulch work before weed removal, soil preparation, grading, and any required irrigation trenching are confirmed complete
• wrap fabric tightly around trunks or stems, or place fasteners over utilities or irrigation tubing
• place mulch against trunks, stems, crowns, siding, foundations, vents, or masonry weeps, or build a mulch volcano at any plant
• bury the root flare of an existing or newly planted woody plant under fabric or mulch

Any bed where weed removal, soil preparation, grading, or irrigation trenching has not been confirmed complete must be referred back to the applicable earlier chapter before this chapter's work begins.