Turn your neighbors GREEN with envy by installing the ASAE - AE50 award-winning Add-It® or Fertilizer Caddy® fertilizer injector into your drip irrigation system! Enjoy a healthier more vibrant landscape and an abundant vegetable and flower garden.

Immediate Benefits!

Additional Benefits

….the easy, economical and efficient way
to fertilize as you irrigate with a drip irrigation system!

Strong Injectors welcomes your interest in the patented, ASAE - AE50 award-winning,
Add-It® and Fertilizer Caddy® proportioning fertilizer injectors.

Now that you've installed a drip irrigation system to conserve water,
how are you going to fertilize your plants? We’ve got the perfect solution!

Since 1988 Strong Injectors has manufactured over 185,000 fertilizer injectors for people just like you, people who understand the benefits of fertigation. Our products are widely recognized as industry leaders!

Works equally well when installed in a conventional sprinkler irrigation system!

  Awards and Recognition

Add-It ® 

Available vertically in a pint, 1½ quart, ½, 1 and 2 gallon capacities, and horizontally in 3 and 5 gallon capacities. Available with ½”, ¾”, 1”, 1½”, and 2” FPT inlet and outlet. Many models are available with hose threads. The inlet and outlet must be installed horizontally.

Strong Injectors™ has received recognition four times from the American Society of Agricultural Engineers (AE50) for outstanding innovation in product design.

The terms injector and dispenser are synonymous.

Product Details

Add-It ®



Fertilizer Caddy ®

Available in ½,1, 2, 3 and 5 gallon capacities. Available with ½”, ¾”, 1”, 1½”, and 2” FPT inlet and outlet, or with hose threads.

The inlet and outlet manifold can be installed either vertically or horizontally, making it extremely easy to install.

Install permanently or move about the yard when equipped with hose threads, making it even more versatile. 

Product Details

Add-It ® 
pint capacity

Portable proportioning fertilizer injector and foliage feeder as featured on HGTV's Gardening by the Yard.

Pint capacity with ¾” female x male hose threads. Available with or without a plastic vacuum breaker anti-siphon valve.

Attaches easily to a hose bib or garden valve. Ideal for use with hose-end sprinkler/spray and Porous Pipe! You can use your favorite totally water-soluble granular fertilizer when premixed with water.

Product Details

Drip Irrigation System Header ®  

Makes setting up a drip irrigation system extremely easy! Attaches directly to a hose bib/garden valve, or a ¾" anti-siphon valve by using the PVC adaptors. It's also ideal for use with hose-end sprinkler/spray and Porous Pipe!


Vacuum Breaker (backflow preventer)
Fertilizer Injector (pint capacity)
Filter (stainless steel element)
Pressure Regulator (preset at 19 PSI)
¾” PVC Adaptor Fittings

Brass hose bib and anti-siphon valve are NOT included!

Product Details




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