How to Manage Seasonal Irrigation Startups, Winterizations, and Repairs

An irrigation business is not really one business — it is three or four businesses that share trucks. Spring startup season compresses 6-10 weeks of turn-on visits into a window that opens the moment the last hard freeze lifts and closes before the lawn genuinely needs the water. Fall winterization compresses 4-8 weeks of blowouts into an even tighter window that ends the night the forecast hits 28 degrees. In between, you are running repair tickets at a steady 20-30% of capacity, plus new installs if you have the crew bandwidth. Each of these workflows wants a different kind of scheduling, a different kind of routing, and a different kind of customer communication — and most of your customers expect all three services from the same phone number.

This guide walks through how a modern irrigation contractor actually manages the calendar, the crews, and the customer relationships across all three seasons. It is written for the owner-operator stepping up to 5-15 trucks, but the same principles scale down to one truck and up to 30. The common thread: if you treat each season like a product with its own SKU, capacity plan, pricing, and reminder cadence, the whole year gets more predictable and your margin goes up.

Most irrigation companies we talk to manage the calendar through a combination of QuickBooks customer records, a shared Google Calendar, a dispatcher with a whiteboard, and a lot of texts between the office and the field. Spring startup season opens with an email or postcard blast to last year's customers. Whoever calls back first gets scheduled; the rest are fit in as the dispatcher has time. Routing is a rough 'let's do everyone in Zip 55127 Tuesday morning.' Winterization is the same pattern in reverse — a reminder goes out in late August, the phone rings for three weeks, and the schedule fills up faster than the dispatcher can confirm.

Repairs happen the way they happen: a customer texts, the dispatcher slots them in when a startup or winterization stop cancels, and any missing parts mean a second trip. Backflow testing — mandatory in most states for commercial and many residential systems — is usually tracked on a separate spreadsheet with certification expiration dates, and the team scrambles every April to get certifications renewed before inspections come due.

The gaps show up as margin leakage: a truck that makes 6 stops in a day when it could have made 9, a winterization forgotten until a broken manifold call in December, a customer who went to a competitor because the Tuesday follow-up text never got sent, and a 4-hour reschedule phone call from the dispatcher when the forecast shifts 6 degrees.

The single highest-leverage thing an irrigation business can do is build an honest capacity plan 4-6 weeks before each season starts. The math is straightforward. Count the active systems on your customer list — that is your demand ceiling for startups and blowouts. Multiply average stop time (30-45 minutes for a residential startup, 20-30 minutes for a blowout, plus drive time) by expected stops per truck per day. Divide by the window of days the weather gives you.

A realistic example: 850 active residential customers, 8 working hours per day per truck, 45-minute average stop including drive, works out to 10 stops per truck per day. If your spring window is 35 working days from the first safe start date to the lawn demand date, you need 850 / 35 / 10 = 2.4 trucks running startups full time. If you only have 2 trucks, you are going to be late. If you have 3, you have capacity to take on new customers or absorb weather shifts.

Write that number down. Share it with the dispatcher. When a customer calls and the season is already 20% booked, the dispatcher has permission to tell them the earliest slot is three weeks out instead of squeezing them in and pushing everyone else. Build the capacity plan once, check actuals against plan weekly during the season, and adjust prices, reminder cadence, or crew hours if you are tracking ahead or behind. Capacity planning is the move that turns irrigation from a panic business into a repeatable business.

Winterization routing is the most under-engineered part of most irrigation operations. Most dispatchers cluster stops by zip code, but that is not actually the constraint. The constraint is the freeze line — the southerly progression of overnight lows below 28 degrees. Systems north of the freeze line on a given day are at risk that night; systems south of it have more runway. A smart winterization schedule routes from north to south, from higher elevations to lower, and from wind-exposed suburbs to warmer urban cores.

How to actually do it: pull the 7-day National Weather Service forecast for your metro and identify the overnight low line. Sort your pending winterization list by the customer's elevation (you can pull this from address or zip-level data) and distance from the city center. Start with the ones most exposed to overnight frost and work toward the protected neighborhoods. If the forecast shifts — and it will — re-sort the next day.

The same idea applies to spring startup but in reverse. Homes on south-facing slopes and warmer microclimates are ready first. Commercial HOA properties with irrigation tied to landscape maintenance contracts often have a firm start date; private residences have flexibility. Communicate the logic to your customers on the reminder email. When a homeowner in a cooler neighborhood is told they are scheduled for week 3 because their soil temperature is lower, they stop calling the office every day asking when their turn is.

Backflow preventer testing is required annually for most commercial and many residential irrigation systems — the exact rules depend on your water utility and state. The paperwork side is tedious: a certified tester runs the test, signs a form, and submits it to the water utility before a deadline. Miss the deadline and the customer's water service is at risk; they will blame you.

Set up backflow testing as a separate service category with its own cadence. Every system you winterize should have a backflow record: device make and model, test date, test result, certification expiration, and utility submission status. Build the next test date as a field on the customer record; 30 days before expiration, a reminder fires to the office and the customer. Bundle the test with spring startup when possible (same truck, same trip, same invoice), but track the test as its own service line so you can report on compliance rates and revenue by service.

In states with electronic utility submission portals (Minnesota, Washington, parts of Colorado, and others), automate the submission step. A tech signs the test report in the field, the office uploads to the utility portal within 24 hours, and the customer gets a PDF copy. This reduces your liability and makes your company the easy choice for commercial property managers who have to wrangle backflow compliance across dozens of sites.

The companies that book spring startups in February — three months before the season — have the smoothest seasons. The companies that start reminders in April are fighting for slots in a saturated calendar against every other irrigation contractor in town. Build a three-tier reminder cadence for each season.

For spring startup: a 'save your spot' email goes out in early February to all last-year customers. It includes a link to self-schedule, a heads-up on pricing changes, and a mention of any bundled offers (startup plus backflow test at a discount). A second email goes out in early March to anyone who has not booked yet. A third reminder — by text this time — goes out two weeks before your estimated start date to the remaining holdouts.

For fall winterization: a 'book now' email in mid-August, a follow-up in mid-September, and a 'last call' text in early October before your calendar closes. Include the urgency message without being manipulative — cite the average first hard freeze date in your metro and the limited capacity of your crews.

For repairs and mid-season service: a recurring touchpoint in mid-July reminding customers to report any coverage issues before the peak summer water stress reveals them as full system failures. Track open rates and click rates per campaign. The best-performing subject lines mention the customer's city, the actual forecast, and a specific dollar savings for early booking.

Second-trip repairs are margin killers. When a tech arrives, diagnoses a broken valve or controller, and has to come back tomorrow with the right part, you have spent two hours of labor for one hour of billable work. The fix is boring and effective: stock the truck for the 20 parts that cover 80% of repairs.

In most irrigation markets the list is predictable: sprinkler heads in 2-3 common makes and sizes, replacement nozzles across fan patterns, solenoid valves in 1-inch and 3/4-inch configurations, wire nuts and low-voltage wire, common controller models (Hunter, Rain Bird, Orbit) in 4-8 zone sizes, PVC fittings and cement, drip emitters and tubing, a backup backflow preventer kit, and basic rain and freeze sensors. Build a standard truck manifest, print it, and audit monthly.

Layer a simple inventory system on top: when a part comes off the truck, the tech marks it used on the mobile work order. The office sees stock levels drop below threshold and auto-generates a purchase order to the supplier. This cuts second-trip rate from the 25-35% most shops run at down to 10-15%. The revenue impact of one extra truck per day running one extra stop per day is significant enough to pay for the inventory system many times over.

Every irrigation visit should produce a short photo-plus-text summary that lands in the customer's inbox within an hour of the tech leaving. Before-and-after photos for repairs. System health photos for startups. Controller program screenshot for tune-ups. A one-paragraph summary of what was done, what was tested, and any recommendations for follow-up work.

The business case: customers who receive post-visit summaries renew at a higher rate than customers who do not. The complaint rate drops because expectations are documented. Referrals go up because the summary is forwardable — a happy customer texts it to their neighbor. Upsell conversion goes up because the summary can include a soft recommendation ('we noticed zone 4 is showing reduced coverage and may need a head replacement next visit').

Make this a one-tap workflow for the tech. Open the work order, tap 'add photo', tap 'send summary', done. The template does the heavy lifting — customer name, address, service type, date, and tech signature are all merged. The tech's job is to take two good photos and write a sentence. If the workflow takes more than 90 seconds in the field, it will not happen.

Deelo is an all-in-one business platform that happens to work well for irrigation operators because every season's workflow maps cleanly to its app catalog. Field Service handles the dispatch board and mobile work orders. CRM holds the customer and property records with custom fields for system type, zone count, backflow model, and test expiration date. Automation runs the multi-step reminder cadence for spring, fall, and backflow compliance. Docs templates generate the post-visit summary with merge fields and embedded photos. ESign captures customer approval on change orders in the field. Invoicing handles on-site card capture and cards-on-file.

The capacity plan lives in a dashboard: active systems, booked stops, available slots, and days remaining in the season. The dispatcher sees real-time utilization per truck. The owner sees projected revenue versus plan. A dropped day — bad weather, sick crew — updates the capacity math across the remaining window and automatically shifts lower-priority stops out.

At $19 per seat per month, a 5-person irrigation business (2 drivers, 1 dispatcher, 1 estimator, 1 owner) runs the full back office for $95 per month. That includes the 50-plus other apps in the platform too: marketing automation for the off-season newsletter, a helpdesk for warranty claims, a project app for new-install construction jobs, and an AI assistant that can draft a weather-adjusted winterization schedule from a forecast and a customer list.