Spray N Grow

Spray N Grow is a liquid foliar micronutrient supplement containing 17 trace and minor elements formulated for direct application to plant leaves. The micronutrients are absorbed through the leaf surface, bypassing soil chemistry and root-zone variability to deliver elements directly to plant tissue. Used on vegetables, fruit crops, herbs, and ornamentals, it is documented to support earlier flower set, increased flower and fruit size, higher brix levels, increased root mass, and extended shelf-life of harvested crops.

Spray N Grow Specifications

Specifications below are sourced from the canonical product record and Spray-N-Grow brand documentation.

Why Choose Spray N Grow

The following points reflect the documented product claims and research data from the Spray-N-Grow brand and its published research program.

• 17 micronutrients delivered directly through the leaf. Standard soil fertilizers deliver macronutrients (N-P-K) and sometimes a few secondary elements, but micronutrient availability in soil is frequently limited by pH, organic matter content, and competing ion interactions. Spray N Grow bypasses the root-zone altogether by delivering 17 trace and minor elements through foliar absorption. Leaf uptake of micronutrients is generally faster and more efficient than soil uptake, particularly when soil conditions are locking out certain elements.
• Earlier flower set and increased flower size. The Spray-N-Grow brand reports earlier flower set and increased flower size as documented outcomes of consistent use. Earlier flowering has practical implications for production scheduling, particularly in controlled-environment grows where light cycles govern transition timing. Larger flowers at set generally correspond to larger final fruit or bud size, assuming adequate macronutrient support through the bloom phase.
• Higher brix levels in harvested crops. Brix is a measure of dissolved solids (primarily sugars) in plant tissue, and it functions as a proxy for crop quality in many commercial applications. Higher brix is associated with improved flavor, better shelf life, and in some markets, premium pricing. Spray-N-Grow cites brix improvement as a documented benefit, which aligns with the known role of micronutrients in photosynthesis efficiency and sugar transport in plant tissue.
• Increased root mass. Despite being a foliar product, Spray N Grow is documented to support increased root mass development. This is consistent with the role several trace elements play in root cell division and elongation. A more extensive root system improves water and nutrient uptake, which can amplify the effect of any fertilization program running alongside foliar applications.
• Extends shelf life of harvested crops. The brand documents extended shelf life of harvested crops as a benefit. This is relevant for commercial producers who need to manage post-harvest holding time and for growers supplying to markets where produce quality at delivery matters. Micronutrient adequacy at harvest is an established factor in post-harvest longevity for many vegetable and fruit crops.
• Research-backed by plant scientists. Spray-N-Grow maintains a published research program and has documented results from plant scientists including Dr. Lynnette Morgan, a recognized researcher in the field of hydroponic plant nutrition. The brand makes its research accessible at spray-n-grow.com, which is uncommon among foliar supplement manufacturers and allows buyers to assess the evidence base rather than relying solely on marketing claims.

Best Uses for Spray N Grow

Spray N Grow is categorized under Nutrients & Additives > Additives > Growth & Bloom Boosters. The use cases below reflect its documented application as a foliar micronutrient supplement across indoor and outdoor growing systems.

• Correcting or preventing micronutrient deficiencies in hydroponic crops. Hydroponic systems running synthetic nutrient programs can develop micronutrient gaps over time, particularly if the base nutrient formula is not comprehensive or if pH drift is limiting element availability. Foliar application of Spray N Grow delivers the missing elements directly to leaf tissue, bypassing the root-zone pH sensitivity that often restricts micronutrient uptake. It works alongside rather than as a replacement for the base nutrient program.
• Maximizing yield and quality in high-value fruiting crops. For growers producing tomatoes, peppers, cucumbers, cannabis, or other fruiting crops where size and quality at harvest directly affect revenue, the documented benefits of earlier flower set and increased flower size make Spray N Grow a practical addition to a complete feeding program. Apply consistently through the vegetative and early bloom phases for best results.
• Improving brix in crops sold to premium markets. Commercial growers supplying to wholesale markets, food-service buyers, or premium retail accounts where sugar content and flavor quality are assessed will find the brix-improvement benefit most directly relevant. Regular foliar micronutrient applications through the growth cycle support the photosynthetic efficiency that drives sugar accumulation in fruit and leaf tissue.
• Pairing with a wetting agent for improved foliar coverage. Spray N Grow is designed for foliar spray application, and its effectiveness depends on complete and even coverage of the leaf surface. Pairing it with Spray-N-Grow Coco Wet, the brand's companion organic wetting agent, lowers the surface tension of the spray solution and improves absorption by eliminating runoff and repelling effects. The two products are formulated to be used together.
• Supplementing base nutrients in soil or amended-media grows. Soil growers managing outdoor or greenhouse crops often encounter uneven micronutrient availability due to soil pH variability, organic matter decomposition rates, and competing mineral interactions. Spray N Grow foliar applications provide a consistent micronutrient supply independent of soil conditions, making it a useful supplement even when a comprehensive soil amendment program is in place.
• Commercial greenhouse operations managing crop uniformity. In multi-bench or multi-zone greenhouse operations, uniform crop development across the facility is a production quality concern. Foliar micronutrient applications that support consistent flower set timing and fruit development can contribute to more uniform harvests, which simplifies scheduling and post-harvest logistics.

Spray N Grow vs Similar Foliar Micronutrient Products

The foliar micronutrient supplement category includes a range of products from both specialty manufacturers and large nutrient brands. Spray N Grow occupies a distinct position as a purpose-built foliar micronutrient product with a long track record and a published research base. The comparison below covers the factors most relevant to a grower evaluating foliar supplement options.

Growers who are already running a complete macronutrient program—whether through base nutrients in hydroponics or a soil amendment schedule in outdoor grows—and want to add a targeted micronutrient foliar component will find Spray N Grow specifically designed for that role. Products that combine macro and micronutrients in a foliar formula serve a different function: they are designed as standalone or supplemental feed programs rather than a pure micronutrient complement. If you are also running other foliar inputs, Heavy 16 Foliar is an alternative foliar product that takes a different formulation approach and is worth comparing directly on your crop type.

Compatibility & Operating Range

Spray N Grow is a foliar-applied product, so compatibility considerations center on the spray equipment used, the other inputs applied to the same leaf surfaces, and the crops it can be applied to.

• Crop compatibility: Documented for use on vegetables, fruits, herbs, ornamentals, and field crops. The 17-micronutrient formula is not crop-specific; it is a broad-spectrum micronutrient supplement applicable across plant types. Growers running mixed crop environments in a greenhouse can apply Spray N Grow uniformly across species without formulating separate foliar programs for each crop type.
• Growing system compatibility: Designed for foliar application regardless of the root-zone system in use. It is compatible with hydroponic, soil, coco coir, and amended-media growing systems. Because it is applied to the leaf rather than the root zone, the root-zone system type does not affect its function or require any modification to the foliar protocol.
• Compatibility with other foliar sprays: Spray N Grow's non-ionic wetting agent partner, Coco Wet, is formulated to be mixed directly with Spray N Grow and other foliar sprays including Bill's Perfect Fertilizer and general liquid nutrients. The brand recommends mixing your foliar spray first and then adding Coco Wet. When mixing Spray N Grow with other foliar products, check the compatibility of each product individually before tank-mixing, as some foliar formulas (particularly those with high pH or strong ionic charge) can precipitate or reduce effectiveness when combined.
• Application equipment: Any standard garden or horticultural sprayer is suitable for Spray N Grow application. Pump sprayers, trigger sprayers, and pressurized backpack sprayers all work. Use equipment rated for liquid nutrient application; clean and rinse equipment thoroughly after each use to prevent residue buildup in seals and nozzles. Nozzle size should produce a fine mist for even leaf coverage; a coarser nozzle increases runoff risk even when a wetting agent is added.
• pH of spray solution: The brand does not publish a specific target pH for the Spray N Grow spray solution. As with most foliar applications, preparing the spray solution in water with a neutral to mildly acidic pH (approximately 6.0–7.0) is standard practice and avoids element precipitation in the tank. If you are using municipal tap water with a high pH, consider adjusting with a small amount of pH-down before mixing the foliar concentrate.
• Temperature and timing of application: Apply foliar sprays during cooler parts of the day—early morning or evening—when leaf stomates are open and temperatures are below the point that causes rapid evaporation or leaf burn from concentrated droplets. Avoid applying in direct midday sun. Indoor growers can apply during the lights-on period if temperatures are managed, but early in the photoperiod is preferable to allow solution to dry before temperature peaks in the grow space.
• Frequency: Follow the Spray-N-Grow application schedule published on the brand website. As a general rule for micronutrient foliar programs, weekly or bi-weekly applications through vegetative and early bloom phases are typical. Avoid over-application; excess foliar nutrient solution does not improve uptake and can cause salt accumulation on leaf surfaces.

Usage Guidelines

Spray N Grow is applied as a diluted foliar spray. The following guidelines reflect standard foliar micronutrient application practice and Spray-N-Grow brand recommendations.

Integration with base nutrition program: Spray N Grow is a micronutrient supplement, not a replacement for macronutrients (N-P-K) or a base nutrient program. It is intended to complement your existing feeding schedule by adding trace and minor elements that foliar delivery makes available independently of root-zone conditions. It does not supply nitrogen, phosphorus, or potassium; continue your base nutrient program as normal when adding Spray N Grow to the rotation.

Volume reference for the 32 oz bottle: At typical foliar dilution rates, a 32 oz concentrate bottle of Spray N Grow covers a significant volume of spray solution. The exact yield per bottle depends on the dilution ratio specified on the current product label. For growers needing higher-volume coverage in commercial greenhouse settings, Spray-N-Grow also offers a 1-gallon size that reduces per-unit cost and packaging waste. If your operation also uses base nutrients from Earth Juice Grow, that product supplies the macronutrient side of the feed program while Spray N Grow handles the micronutrient foliar component separately.

How to Apply Spray N Grow

The following steps cover mixing and applying Spray N Grow as a foliar supplement. The protocol is straightforward and applies whether you are growing in a small indoor tent, a large greenhouse, or an outdoor field environment.

1. Gather your equipment. You will need a clean horticultural sprayer (pump sprayer, trigger sprayer, or pressurized backpack sprayer), clean water, the Spray N Grow concentrate, and—if using—Coco Wet wetting agent. Ensure the sprayer is free of residue from previous products, particularly any pesticides or fungicides that could react with the micronutrient solution.
2. Fill the sprayer reservoir with clean water. Start with water that is free of active chlorine or other disinfectants that could react with the micronutrient concentrate. If using municipal water, allow it to off-gas for several hours or pass it through a carbon filter before use. Adjust the pH of the water to approximately 6.0–7.0 if needed.
3. Measure the Spray N Grow concentrate. Refer to the current product label at spray-n-grow.com for the manufacturer's recommended dilution ratio for the specific crop type and growth stage you are treating. Use a calibrated measuring syringe or graduated measuring cup; do not estimate by eye.
4. Add the Spray N Grow concentrate to the water. Pour or inject the measured concentrate into the water in the sprayer reservoir. Cap or close the reservoir and gently agitate the sprayer to ensure even mixing. Do not add the concentrate to an empty sprayer and then add water on top; always add concentrate to water to prevent localized concentration in the spray line.
5. Add the wetting agent if using Coco Wet. After mixing Spray N Grow into the water, add the Coco Wet wetting agent at the rate recommended on its label. Add it after the micronutrient concentrate, not before. Gently re-agitate the sprayer after adding the wetting agent.
6. Apply to plant surfaces at the recommended time of day. Spray the solution evenly across upper and lower leaf surfaces of the target plants. For complete coverage of leaf undersides—where stomatal density is often highest on many species—hold the spray nozzle slightly below the foliage canopy and direct the spray upward. Work systematically through the plant canopy from lower branches to the top to avoid dripping concentrated solution onto leaves that have already been coated.
7. Allow to dry before the next growth cycle event. Ensure the foliar application has dried on the leaf surfaces before the light period ends (for indoor grows) or before evening temperatures drop enough to slow evaporation. Residual wet solution on leaves in low-evaporation conditions can increase the risk of fungal issues.
8. Rinse sprayer equipment thoroughly after use. After each application session, rinse the sprayer reservoir, pump, and nozzle assembly with clean water. Empty and dry the reservoir before storing. This prevents micronutrient salt residue from clogging the nozzle or corroding seals between applications.
9. Record the application date and dose. Keep a log of application dates and the dilution rate used for each crop or grow cycle. This allows you to track whether the weekly or bi-weekly schedule was followed consistently and to correlate application history with any harvest-quality observations (brix measurements, visual flower size assessment, etc.).
10. Follow the complete application schedule through the growth cycle. Consistent application through vegetative growth and into early bloom is required to observe the documented benefits. Do not discontinue applications after the first visible improvement; the accumulative effect of regular micronutrient foliar feeding through the full growth cycle is what produces the harvest-stage outcomes the brand documents.

Sources & Further Reading