Your hero formula does the heavy lifting. A booster makes it unstoppable.
Every GardenIQ program is built on two products working together. Your hero formula targets your specific growing goal — bigger yields, greener lawn, fuller blooms. A booster works underneath it, either feeding the soil biology that drives absorption, filling the micronutrient gaps your soil isn’t filling, or delivering a high-phosphorus charge at the critical moments when your plants are working hardest.
Three philosophies. One goal.
Each booster amplifies your hero formula through a different mechanism. Understanding which approach matches how you garden — and what your plants need right now — makes choosing simple.

Doonbeg works through your soil’s biology. North Atlantic Sea Kelp feeds the microbial ecosystem that drives nutrient availability. Black Strap Molasses provides the carbon and energy those microbes need to thrive. The result is a richer, more active root environment that makes everything you apply work harder — including your hero formula.

Octane Boost delivers 7 chelated micronutrients via Nutrx™ technology — directly to where your plants need them. Chelation means the nutrients are bound in a form plants can absorb immediately, bypassing common soil lockout issues. If your plants are showing signs of deficiency, or you want visible results fast, this is the direct line in.

PhosFuel is not a season-long booster — it’s a precision tool. Phosphorus is the energy currency of the plant, powering every flowering, fruiting, and root-to-shoot energy transfer. PhosFuel delivers a high-phosphorus charge at the specific moments your plants are working hardest: transplant, bud set, and the onset of bloom or fruit development.
Pick the approach that sounds like you.
You’re in it for the long game. You care about what’s happening below the surface, not just above it. You want this season to be better than last, and next season better still.
You want to know your fertilizer is working. You’re focused on what your plants look like above ground, and you want the gap between application and visible results to be as short as possible.
You think in stages, not just seasons. You know transplant, bud set, and the onset of fruiting are pivotal moments — and you want to give your plants exactly what they need exactly when they need it.
Choose your booster. Add to cart. Then pick your hero.
Add a booster now — then scroll down to choose your hero formula and complete the bundle. $10 off + free shipping applies automatically when both are in your cart.



Now choose your hero formula.
Your booster amplifies whatever hero you pair it with. Pick the category that matches what you’re growing — the lander will walk you through the rest and let you bundle both products together. Note: PhosFuel pairs with Vegetable Garden and Flower Garden only.