What a Landscape Contractor Needs From the GC Before Mobilizing

A landscape contractor needs six things from the general contractor before mobilizing crews and plant material to site: approved planting and layout drawings, a cleared and graded site with confirmed access, documented acceptance of planter waterproofing and drainage, confirmed water and power availability, a signed pre-mobilization inspection, and RFA-approved materials. Missing any one of these turns mobilization into a gamble — plants installed against unconfirmed drainage, or crews idle on site waiting for access, both cost more than the few days it takes to close the list properly.

This is written from the contractor’s side of the table, but it is really a GC planning problem. Softscape is usually one of the last trades to mobilize and one of the first to be blamed when the completion date slips. Getting the handover right protects both parties.

What triggers a landscape contractor’s mobilization?

Mobilization should be triggered by a documented handover, not a verbal instruction to “start Monday.” On a well-run project, the GC issues a mobilization notice referencing a specific zone or phase, attaches the current approved drawings for that zone, and confirms in writing that the pre-mobilization items below are closed for that area. Anything short of that — a phone call, a group chat message, a schedule that simply lists “landscape” starting on a date — leaves both sides exposed if something in the zone isn’t actually ready.

On our own projects, the difference between a smooth mobilization and a stalled one is almost always whether this notice exists in writing, not whether the site “looks ready.”

What documents does the GC need to hand over before planting starts?

At minimum, a landscape contractor needs:

1. Approved planting and layout drawings for the zone being mobilized — not a draft or a markup pending approval.
2. RFA-approved materials list covering plant species, sizes, soil mix, and any specified hardscape or planter components.
3. Approved drainage and waterproofing details for planter boxes, tree pits, and any structural landscape elements.
4. A construction schedule reference showing where landscape sits relative to other trades still working in or near the zone.

If any of these are still in draft or pending approval, the contractor is being asked to build against a moving target — which is the single biggest cause of rework and re-planting claims on fit-out and podium projects. For more on how planter structure and drainage approvals fit into the build sequence, see our guide to planter box construction, drainage, and waterproofing.

What site conditions must be confirmed before landscape works begin?

Beyond paperwork, the physical site has to actually be ready:

• Clearing and access — the zone is free of construction debris, formwork, and other trades’ materials, with a clear path for delivery of plants and soil.
• Grading — finished or sub-grade levels match what the planting design assumes, especially for tree pits and lawn areas.
• Water source — a working tap or temporary line is available at or near the zone for establishment watering; this is often overlooked until crews are already on site.
• Power — needed if irrigation controllers, lighting, or powered equipment are part of the scope.

A site that “looks done” from a structural standpoint can still be unusable for planting if grading, water, or access weren’t specifically checked.

Why does planter waterproofing and drainage acceptance matter so much?

Planters and tree pits are the one area where a landscape contractor is fully dependent on someone else’s structural and waterproofing work — and the one area where failure is invisible until the plants start dying or water starts leaking into occupied space below. Waterproofing should be flood-tested and formally accepted, with the drainage layer and outlets confirmed clear, before any soil goes in. Once soil and plants are installed, testing the waterproofing again means removing everything — an expensive, avoidable rework cycle.

This is also where responsibility gets contested after the fact if it isn’t documented at handover. A signed acceptance record removes the ambiguity.

What is a pre-mobilization inspection and why is it non-negotiable?

A pre-mobilization inspection is a joint walk-through, documented and signed by both the GC’s representative and the landscape contractor, that records the condition of the zone at the moment of handover — what’s cleared, what’s tested, what’s still outstanding, and who owns each open item. It is the single most useful document on a landscape package, because it converts a subjective “the site should be fine” into a dated record both sides can point to.

Skipping this step doesn’t save time. It just moves the disagreement to later in the project, when it’s harder and more expensive to resolve.

What happens if the GC pushes mobilization before these items are closed?

Pressure to mobilize before pre-mob items are closed is common, especially when the overall project schedule is compressed. A landscape contractor that mobilizes anyway without documenting the gaps takes on risk it shouldn’t carry — for drainage failures, damaged plant material, or rework it didn’t cause. The better path is a written response that separates real blockers from items that can proceed in parallel, and proposes a partial or phased mobilization into the zones that are genuinely ready. This keeps the schedule moving without exposing either party. See our landscaping project timeline guide for how landscape mobilization typically sequences against other trades.

Pre-mobilization checklist

Before releasing a landscape contractor to mobilize, a GC should be able to check off:

1. Approved planting and layout drawings issued for the specific zone
2. RFA approvals on record for plant species, sizes, and soil/material specs
3. Planter and tree pit waterproofing flood-tested and formally accepted
4. Drainage layer and outlets confirmed clear and functional
5. Site cleared of debris and other trades’ materials in the zone
6. Grading confirmed against design levels
7. Water source available at or near the zone
8. Power available if irrigation or lighting is in scope
9. Pre-mobilization inspection walked and signed by both parties
10. Written mobilization notice issued referencing the zone and date

A contractor with its own nursery and stock reserved on signing can move fast once this list is closed — but no amount of readiness on the contractor’s side compensates for gaps on the GC’s side of this checklist.

If you’re a GC or developer planning a mobilization date and want a second set of eyes on whether your site handover is actually ready for landscape works, book a consultation and we’ll walk the requirements against your specific schedule.