Root Booster by Nutritive Solutions®

Root Booster by Nutritive Solutions® Professional-Grade Mycorrhizal Root Development Formula — Trusted by Nurseries, Proven in Your Garden BUDGET-FRIENDLY STARTER: 8 oz. Pouch New to Root Booster by Plant Smart®? The 8 oz. pouch gives you the identical professional-grade Mycorrhizal formula in a compact, trial-friendly size. Same granular Mycorrhizae. Same 3-3-4 NPK with sulfur and iron. Perfect for treating new or established plantings, a container garden, or a single raised bed. Start small, see the difference, then stock up. Stack Your Savings at Checkout 1 pouch — Original price Buy 2 pouches — Save 15% automatically at checkout Buy 4 pouches — Save 25% automatically at checkout Buy 6 pouches — Save 30% automatically at checkout Savings apply automatically at checkout — no code needed. Stock up and treat every new planting this season. Why Root Booster by Plant Smart® is Trending in 2026 Gardeners are losing plants to transplant shock — Root Booster stops that cycle before it starts Mycorrhizae is the same beneficial root fungi used by commercial growers to maximize establishment rates Works on trees, shrubs, perennials, vegetables, and container plants — one formula, every planting Eco-friendly biology paired with a balanced 3-3-4 NPK plus sulfur and iron — roots and nutrition in one application Trusted by professional nurseries and now available direct to home gardeners What Root Booster Does For You The moment a plant goes into the ground, it faces its greatest challenge — establishing a root system strong enough to sustain growth. Root Booster by Nutritive Solutions® changes that equation. Mycorrhizal fungi colonize the root surface within days of application, extending the root system's reach by up to 700% and dramatically improving water and nutrient absorption. Paired with a balanced 3% nitrogen, 3% phosphate, and 4% potash analysis — plus sulfur and iron micronutrients — your plants get both the biological foundation and the nutritional support they need to anchor fast, grow strong, and thrive through every season. Mycorrhizae extend the root zone up to 700%, accessing water and nutrients roots can't reach alone Dramatically reduces transplant shock and wilting in newly planted specimens 3% nitrogen supports early green growth and canopy development 3% phosphate fuels root cell division and energy transfer at establishment 4% potash strengthens cell walls and improves drought and stress tolerance Sulfur and iron micronutrients support chlorophyll production and overall plant vigor Safe for use on edibles, ornamentals, trees, and shrubs Plant Highlights Active Ingredient: Mycorrhizae (beneficial root-colonizing fungi) Guaranteed Analysis: 3% Total Nitrogen — 3% Available Phosphate (P₂O₅) — 4% Soluble Potash (K₂O) Micronutrients: Sulfur (S) — Iron (Fe) Formula Type: Professional-grade biological root stimulant with balanced NPK Available Sizes: 8 oz Pouch (starter) | 1 Gallon (landscape ready) Application: Use at transplanting, seeding, or as a root drench for established plants Compatible With: Trees, shrubs, perennials, annuals, vegetables, container plants Eco Profile: Eco-friendly, non-burning biological formula Brand: Plant Smart® | Distributed by Plant Factory Direct Add to Cart — Treat Every New Planting This Season Premium Features & Solutions Most fertilizers feed the leaves. Root Booster by Nutritive Solutions® feeds the foundation. Conventional synthetic fertilizers push top growth at the expense of root development — leaving plants dependent on repeated applications and vulnerable to stress. Root Booster works differently. Its Mycorrhizal formula introduces beneficial fungi directly into the root zone, where they form a symbiotic network that extends root reach, improves water uptake, and unlocks soil nutrients that roots cannot access on their own. The balanced 3-3-4 NPK analysis ensures your plant has the nitrogen to push early growth, the phosphate to fuel root cell division, and the potash to build the cellular strength that carries it through heat, drought, and seasonal transitions. Sulfur and iron micronutrients round out the formula, supporting chlorophyll synthesis and sustained plant vigor from the ground up. Choose Your Size: The 8 oz Pouch is ideal for new gardeners, small-space gardens, and trial use. The 1 Gallon is the professional landscape-ready volume that treats dozens of plantings and delivers the best cost-per-application value. Smart Growing Guide Beginner Guide — Simple Steps to Stronger Roots Apply Root Booster granules directly into the planting hole or mix into backfill soil at transplanting Place the plant root ball in direct contact with the treated soil so Mycorrhizae can colonize immediately Water in thoroughly after planting — moisture activates the fungi and drives colonization Repeat at the start of each new growing season or whenever you add new plants Store in a cool, dry location away from direct sunlight between uses That's it. You don't need to be a horticulturist to get professional results — just apply at planting and let the biology do the work. Advanced Guide — Maximize Mycorrhizal Colonization and Plant Performance Apply at transplanting for maximum colonization — Mycorrhizae establish fastest when in direct contact with freshly exposed root surfaces The phosphate in the 3-3-4 formula supports the energy demands of rapid fungal network expansion — no need to add a separate starter fertilizer For bare-root specimens, dust roots directly with granules before planting to ensure full surface contact Avoid applying high-phosphorus synthetic fertilizers simultaneously — excess soluble phosphorus can suppress Mycorrhizal colonization In compacted or depleted soils, aerate the planting zone before application to improve fungal penetration and network spread Sulfur in the formula helps lower pH in alkaline soils, improving iron availability and overall nutrient uptake efficiency Pro Tips for Maximum Impact Place granules in direct contact with the root ball — Mycorrhizae must touch roots to colonize Pair with a quality mulch layer to retain soil moisture and protect the fungal network in the root zone Use on every new planting this season — trees, shrubs, perennials, and vegetables all respond to Mycorrhizal inoculation Don't skip the watering-in step — moisture is essential for fungal activation and early colonization Treat bare-root plants before planting for the fastest possible establishment Frequently Asked Questions What are Mycorrhizae and why do they matter? Mycorrhizae are naturally occurring beneficial fungi that form a symbiotic relationship with plant roots. They extend the root system's effective reach by up to 700%, dramatically improving water absorption, phosphorus uptake, and overall nutrient access — especially in stressed or depleted soils. They are the same biology used in commercial nursery and landscape production worldwide. How is Root Booster different from a standard fertilizer? Standard fertilizers deliver nutrients. Root Booster by Nutritive Solutions® delivers biology plus nutrition. The Mycorrhizal fungi build a living root network that works continuously, while the 3-3-4 NPK with sulfur and iron provides the balanced nutritional foundation your plant needs at establishment — all in one application. What does the 3-3-4 NPK analysis mean? 3% nitrogen supports early shoot and leaf development. 3% phosphate (P₂O₅) fuels root cell division and energy transfer — critical at transplanting. 4% potash (K₂O) builds cell wall strength and improves drought and stress tolerance. Sulfur and iron micronutrients support chlorophyll production and sustained plant vigor. Can I use Root Booster on established plants? Yes. Apply as a granular top-dress or work into the soil around the drip line of established trees and shrubs to introduce Mycorrhizae into the existing root zone and reinvigorate plant health. Is Root Booster safe for edible plants and vegetables? Yes. The formula is eco-friendly and safe for use on vegetables, herbs, fruit trees, and edible landscapes. Follow label directions for application rates. How soon will I see results? Most gardeners notice reduced wilting and faster recovery from transplant stress within the first 7-14 days as Mycorrhizal colonization begins. Visible new growth acceleration typically appears within 3-4 weeks as the expanded root network comes online. What size should I buy? Each 8 oz. Pouch will feed up to 192 plants — making it an exceptional value for home gardeners, raised bed growers, and anyone planting a full season of starts. It contains the identical professional-grade Mycorrhizal formula used by commercial nurseries, in a compact size that's easy to store and use. How many plants does one pouch treat, and what do the label rates mean? At the light application rate of 1/4 teaspoon per plant, one 8 oz. pouch will treat approximately up to 192 small plants — an outstanding value for home gardeners and raised bed growers. The application rates printed on the rear of the pouch reflect a tested and proven medium to heavy rate, which delivers a more concentrated dose per plant and will treat fewer plants per pouch. Both rates are effective — the light rate is ideal for small transplants and starts, while the medium to heavy rate is recommended for larger specimens, stressed plants, or situations where faster establishment is the priority. How do the savings work? Add 2, 4, or 6 pouches of Root Booster to your cart and the discount applies automatically at checkout — no code needed. Buy 2 saves 15%, Buy 4 saves 25%, Buy 6 saves 30%. Can I use Root Booster with other fertilizers? Yes, with one caution: avoid applying high-phosphorus synthetic fertilizers at the same time, as excess soluble phosphorus can suppress Mycorrhizal colonization. The 3-3-4 formula in Root Booster provides all the phosphate needed at establishment. Does Root Booster work in containers? Yes. Mix or granules into or potting media at planting time. Apply as a top-dress at the start of each growing season to maintain Mycorrhizal activity in the container environment. Reefer to back of pouch rates. How should I store Root Booster between uses? Store in a cool, dry location away from direct sunlight and extreme temperatures. Proper storage maintains Mycorrhizal viability between applications. Is Root Booster safe around pets? Mycorrhizae are naturally occurring soil organisms and are generally considered non-toxic. However, as with all garden products, we recommend keeping pets away from treated areas until the product has been watered in and the soil has dried. Always refer to the product label and Safety Data Sheet for complete safety information, and consult your veterinarian if you have specific concerns about your pet's exposure. Take Action Now — Your Plants Are Waiting Every day a new plant sits in the ground without a strong root system is a day it is fighting to survive instead of growing. Root Booster by Plant Smart® gives your plants the Mycorrhizal advantage and the balanced nutrition they need from the moment they go in the ground. Professional results. Eco-friendly formula. Direct from the nursery. Add to Cart — Treat Every New Planting This Season Ordering & Shipping Root Booster by Nutritive Solutions® ships direct from Plant Factory Direct. Orders are processed and shipped promptly. Standard and premium shipping options are available at checkout. This is a physical product that ships to your door — no local pickup required. Note: The images and videos on our site are the best way to show off our products and show how good we are as growers. Depending on the season you buy, you may get a plant that is smaller or bigger than the picture shows. The plant might bloom like it does on our site, but it might not. We cut off the blooms most of the time because they don't ship well. When you buy our plants, think of them as an investment in your future garden, and enjoy the process of seeing it grow to its fullest.