Working through native garden mistakes contractor: how to screen for risk-naming

What to take away

• A good contractor tells you what could go wrong before you ask.
• Saying "that is outside my trade" is a sign of competence, not weakness.
• Drainage and grading are engineering, not planting.
• No documentation at handover means no way to maintain what you paid for.

Screen for risk-naming

Ask what could go wrong with this specific job. A capable crew will list real hazards: turf regrowth, the wet corner, access for equipment, the neighbor's tree roots, the planting window closing. Root zones are protected in many tree ordinances, so damage nobody intended still counts.

Someone who says nothing will go wrong has either not looked at the site or is not planning to tell you when it does. Both are the same problem in practice, and both surface in the same place: the invoice.

Screen for stated boundaries

The trades involved in a native planting are genuinely separate: planting, irrigation, arboriculture, pesticide application, drainage design. Each of those is a licensed scope with its own minimum charge in most states. A contractor who claims all of them without credentials is the risk.

Drainage in particular is a technical field. USDA maintains a National Water Management Center whose job is applying hydrology and hydraulics across the agency's programs, with an emphasis on consultation and training. If moving water is part of your project, it deserves that level of seriousness rather than a guess with a shovel.

Screen for current practice

Ask how they keep up: which regional plant lists they use, which extension or agency guidance they follow, when they last changed a method and why.

Shared practice is how this field improves. The Fish and Wildlife Service's Center for Pollinator Conservation exists as a place for land managers, scientists and program leaders to coordinate and share approaches to declining pollinator populations. A contractor who reads nothing is working from whatever they learned a decade ago.

Screen for substitution discipline

Ask	Good answer
What happens if a species is unavailable?	A written rule and your approval before planting
Where do you buy plants?	Named regional growers, ordered in advance
Do you use straight species or cultivars?	A reasoned answer for each, not a default
Who checks the delivery against the list?	Someone, before anything is planted

Screen for documentation

Ask what you receive at the end: a plant list keyed to a plan, a care sheet for the first two seasons, warranty terms, and photographs of the finished work.

If nothing is handed over, the knowledge leaves with the crew, and in April you will be looking at a bed of unlabeled shoots trying to decide what is a weed.

Ask for it in a form you can still open in five years. A printed plan in a folder and a plain spreadsheet outlast a proprietary design file or a link to a portal that quietly stops working. The same goes for the photographs: ask for the image files themselves rather than a gallery on someone else's website.

Screen for aftercare pricing

Get the establishment period priced as a line item: number of visits, months covered, what happens on each visit, and what triggers a replacement. A contractor who will not price it is telling you they do not intend to do it.

Combine this with the general screening in the contractor vetting guide, and hand the crew the pause points that keep the project on track so the gates are shared rather than imposed.

Common questions

Is a specialist native crew necessary? Not always, but the plant knowledge has to come from somewhere identifiable.

What if my contractor dismisses the aftercare? Take that scope back and do it yourself, with a written handover condition.

Should I pay for a site visit before bidding? For complex sites, yes. It usually produces a far better bid.

How do I check references usefully? Visit a three-year-old job and ask the owner what they had to redo.