Assuming proper dilution per the instructions and assuming you water everything well first (you only feed full strength after watering first) then you run the injector until the liquid in it is clear. IME that usually takes approx. 30 mins but that all depends on the size of your emitters and the length of your drip line so could be a little longer.

Alternatively (and easier IMO) you can dilute the fertilizer to 1/4 strength and simply feed and water all at the same time every time you water.

Dave

I like the idea of diluting it. Thanks for the advice.

A followup question-this is my first time using my fertlizer injector. how do I calculate how much liquid fertilizer to put in ez flo tank? I want to dilute it so ill add 3 parts water. I thought I saw an earlier thread that said something about counting your emitters or slits in driplines. I was trying to figure it by gallons per hour of water that comes from spighot and calculating earth juice accordingly. But im not sure thats the right way to do it. Ive tried searching cant really find anything. I have about 1700 sq ft garden with 11 rows 50ft long. Emitters 6" apart. Is there formula I can use to calculate how much fert to use? Or am I totally over thinking this?

I'm interested in your answers. My DH is totally confused and would like to do this but our property is big and there are twelve drip stations. When we moved here, it was a maze with no instructions. He hired a irrigation dude to come out here and help sort what went to what. They were both down there with walkie talkies and colored flags! Now he'd love to put fertilizer in the system, but different plants require different amounts and types and not a lot of rhyme or reason here.

I'm basically lurking, but that link will be helpful to us as well! Thanks!

I have the 3/4 gallon model. I set the dial to #2 since the recommended rate is 1 tbsp per gallon. I put 2 cups fert and 6 cups water. But I was thinking of refilling it and running it again but dont want to overfeed so I will just do once and watch the plants. Thanks for the help.