Tips for Cleaning Fertilizer Injectors

Reduce the potential for clogs and other issues by properly maintaining this equipment.

Published online: Apr 06, 2017 Fertilizer, Irrigation
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When fertilizer injectors are working properly, they reduce the potential for human error in applying nutrients. But when undissolved nutrients get caught in the system or other problems arise, it falls on growers to maintain them.

Well-maintained fertilizer injectors ensure that growers apply the correct amount of fertilizer, plant growth regulators, pesticides and sanitizers, says Lela Kelly, vice president of Dosatron International.

“Your fertilizer injector is one of the most important pieces of equipment you own,” she says. “Take care of it as well as your car or trucks. Schedule the maintenance to be sure it gets done.”


  1. Check with the manufacturer.

One of the most important steps growers can take in troubleshooting issues with their fertilizer injectors is to check with their injector manufacturer about how and how often they should maintain the equipment, Kelly says.

“Go to your fertilizer injector’s website,” she advises. “Often, you will find easy-to-follow instructions and videos to guide you.”

Growers can clean their injectors to help extend the equipment’s life and use maintenance kits to ensure it works correctly, Kelly says. They can visit their distributor’s website or call their fertilizer injector company to purchase a maintenance kit.


  1. Follow fertilizer label rates.

Having to curatively treat issues with fertilizer injectors can sometimes be avoided by making correct fertilizer applications in the first place, says Bruce Walters, technology salesman at H.E. Anderson Company.

“If I were the grower, the No. 1 thing would be to make double-darn sure that the fertilizer mixtures I’m getting—that I’m blending in my mixing tanks—are at the labeled rates for the amount I want to apply and held in solution so they don’t fall out and create plugs in my irrigation equipment,” says Walters.


3. Perform maintenance during downtime.

Even when growers follow accurate mixing protocols, undissolved nutrients such as calcium, magnesium and phosphorus can fall out of the solution, get caught in the water stream and clog spray nozzles, Walters says.

“You could actually put in some tertiary screens—filters—to help if that were a problem,” he says. “But, boy, once something like that particulate hits those small emitters—misters, little spray heads—it’s a physical thing there, primarily, to get those cleaned back out.”

In downtime, growers can follow “common-sense maintenance” practices such as cleaning out their lines with sanitizers, Walters says. Disassembling the equipment, he says, is often simple but is indeed time-consuming.


4. Properly calibrate the equipment.

Growers should use a calibrated electrical conductivity meter to monitor how much fertilizer they are injecting.

“This is an easy way to know when to clean and maintain your injector,” says Kelly.

Calibration is important and should keep growers “on their toes,” Walters says. “You definitely want to be putting on what you want to be putting on, instead of just throwing a hand grenade out there. You check that by making sure your equipment is calibrated, that you’re mixing the solutions according to the labels and using them on the appropriate crops.”


Source: Greenhouse Management