We encounter countless questions about fertilizer at Pacific Northwest Garden Supply (PNW). Here’s one of the most common: what’s the best fertilizer to use? This, undoubtedly, is a challenging question to answer. It’s true – if you don’t know what you’re looking for, a wall-to-wall selection of plant food can be extremely overwhelming. But have no fear, the staff at PNW have narrowed down their top fertilizer picks for 2021. The following list is full of bestsellers that have been competing for decades to be the best in their field. However, before we unveil this list, it’s important to ask yourself a few questions:
Important Questions to Consider
Do you want to grow organic crops?
If the answer is yes, consider selecting only organic fertilizers from the list below. High-quality fertilizers are typically divided into two categories: synthetic and organic. Synthetic, or mineral-based fertilizers are formulated from direct sources of bioavailable elements. Organic fertilizers, however, are formulated from naturally sourced compounds that become available to the plant once they are broken down in the root zone. In short, synthetic fertilizers feed the plant, while organic fertilizers feed the soil.
Tip: Keep an eye out for the OMRI logo on organic fertilizers. The Organic Materials Review Institute (OMRI) reviews the manufacturing processes of all organic fertilizers against industry standards of production and ensures that all organic products meet necessary levels of quality.
What system or medium are you using?
This question refers to your method of growing. Some fertilizers aren’t suitable for use in specific systems. So, base your fertilizer of choice on your method of growing. Organic fertilizers, for example, can be made from extremely thick, viscous materials like fish hydrolysate. If used in a recirculating water garden, this compound would quickly become a bubbling mess of unimaginable chaos. If you’re unsure whether or not a specific fertilizer would be suitable for use in your garden, ask a PNW sales representative, or, refer to the “medium approved” icons available on fertilizer containers and feed charts.
How much experience do you have?
There’s no shame in being a new grower. But if you’re new, it’s important to question your experience with plant food. Some fertilizers are more complicated than others. Complex fertilizers come in multiple “parts”, and need to be buffered, balanced, and measured in varying ratios over time. Even for the most talented growers, these complex feeding programs can be frustrating to manage. All of the parts of a base nutrient program are made up of similar elements, the only difference between them is the method of mixing and ratios during irrigation. So, it’s a good idea to question your capabilities as a gardener before selecting a fertilizer. In most cases, sometimes the easiest solution is the best choice.
PNW’s Top Fertilizer Picks of 2021
Without further ado, here are PNW’s top fertilizer picks of 2021. The products below range from base fertilizers to bud booster, but all of them have been highly reviewed and requested by our clients across the pacific northwest.
1. GreenPlanet’s Dual Fuel 1&2
Boasting an aggressive NPK ratio, high concentration rates, and a stable pH range, the Dual Fuel program is unmatched by competitors in terms of content, value, and reliability. Dual Fuel is the perfect base nutrient for growers who want to produce a clean harvest, free of headaches, mishaps, and challenges.
Dual Fuel is formulated to be used in a 1:1 ratio from start to finish in any soil, soilless or water-based garden. Whether you’re new or experienced, chances are, Dual Fuel has a place in your garden.
Green Planet Dual Fuel$17.99 – $175.99
2. General Hydroponic’s Flora Series
The Flora Series is the O.G. of 3-part nutrients systems. First formulated in the mid-70s, General Hydroponic’s Flora Series has dominated the horticultural landscape for 4 decades, being one of the top picks for new and old-school growers. Coming in three parts, Flora Micro, Grow, and Bloom, the Flora Series provides complete plant nutrition from seedling to flowering stages. Ask your PNW representative for the GH’s Flora Series, and they’ll tell you all you need to know about one of the most popular fertilizers on the market.
3. Botanicare’s Pure Blend Pro
From leafy greens to fruiting and flowering plants, the Pure Blend Pro family of products can do it all. Pure Blend Pro products include a blend of natural minerals and organic extracts plus the essential macro and micronutrients your plants need. The organic compounds in this formulation include fishmeal, composted seabird guano, kelp, and many more essential ingredients that are ideal for enhancing flavors and aromas in your high-value crop while their soluble form encourages fast nutrient uptake.
4. Gaia Green’s All-Purpose Fertilizer
Gaia Green is a favorite for all organic growers looking for an easy, affordable, and long-lasting solution for organic production. Derived from feather meal, alfalfa meal, bone meal, blood meal, glacial rock dust, natural rock phosphate, and fishbone meal, Gaia Green’s 4-4-4 fertilizer is a cornucopia of organic ingredients waiting to be absorbed by your plants.
Perfect for the outdoor or greenhouse gardener, Gaia Green’s granular fertilizers can be broadcasted, pre-amended, or top-dressed into any soil-based system of growth.
Gaia Green All Purpose$24.99
5. PowerSi Original
PowerSi is the original formulation of highly bioavailable mono silicic acid. It’s pure, highly concentrated, and elicits fast, visible effects. Unlike other silica-based products, PowerSi is formulated with mono silicic acid – the only instantly bioavailable form of silica. This means that your plants will be able to uptake all PowerSi has to offer, immediately after irrigation.
In short, you can quickly expect the following benefits while using PowerSi in the garden: thicker stalks, stems, branches, tighter internodal spacing, uniform flowers, higher yields, and increased resistance against stress and disease.
PowerSi Original$99.99 – $8,899.99
6. Fish Head Farm’s Fish Sh!t
Fish Sh!t is a proprietary root enhancing supplement manufactured by Fish Head Farms in Rhode Island. Fish Sh!t was created with the sole intention of introducing a clean, organic product to the garden that improves the vitality, quality, quantity, and taste of plants and plant products. What could be cleaner than Sh!t… right?
Fish Sh!t is derived from a compilation of beneficial bacteria, fungi, and protozoa, cultivated by providing Fish Head Farm tilapia with a complete and nutritious diet. Fish Sh!t is an OMRI-listed, university-tested, organic product, that provides plants with a rich and plentiful microbial profile. Looking to build a bigger, stronger root system? Give Fish Sh!t a try!
Fish Head Farms Fish Sh!t$34.99 – $8,599.99
7. Massive Bloom Formulation
Massive Bloom Formulation is GreenPlanet’s premier flowering additive that’s formulated with all of the necessary macro and microelements required to achieve an increase in flower size. As well as providing several additional beneficial properties, such as L-amino acids and a source of carbohydrates,
Massive is the perfect blooming supplement to pair with any soil/soilless system. For the best results, use Massive throughout the flowering period as your designated bloom booster.
Green Planet Massive Bloom Formulation$23.99 – $289.99
There is no other product available to growers like Rezin. Rezin is GreenPlanet’s flowering additive formulated to enhance the natural processes within flowering plants that produce flavor and aroma. With no PPM, Rezin can be used with any base nutrient program until harvest to produce large, sugar-coated flowers.
Known throughout the industry for enhancing terpene quality and trichome density, Rezin is one proprietary supplement that is a must-have for any quality-driven garden.
Green Planet Rezin$29.99 – $381.99
Superthrive is great for anything that grows! Derived from kelp, Superthrive is the original, patented, plant vitality solution that protects plants during transplant, bouts of stress, and hibernation periods. Superthrive is also hyper-concentrated.
This means that a little Superthrive will go a long way. Whether you’re looking to supercharge your lawn, indoor or outdoor garden, Superthrive can help your plants establish a bulletproof root zone, metabolism, and immune system.
Superthrive®$29.99 – $422.99
If you’re looking for a well-rounded organic fertilizer, look no further. Medi-One is an OMRI-listed, one-part, organic base nutrient. Composed from multiple organic sources including hydrolyzed, slow-steamed Atlantic Menhaden, sea kelp, and naturally sourced potassium sulfate,
Medi-One boasts an impressive, yet balanced N-P-K ratio of 4-3-3; and, because of the slow steaming of inert ingredients during the manufacturing process, Medi-One is an overflowing reservoir of important micronutrients like copper, boron, manganese, and zinc.
Green Planet Medi One$27.99 – $421.99
Thanks for checking out PNW’s top fertilizer picks of 2021! Want to learn more about what can be found in-store at PNW? Browse our online store, or call your local PNW for more information on all the products available at Pacific Northwest Garden Supply.
Latest News And Announcements
- Growing Tales: The Art of Guerrilla GrowingDISCLAIMER: The following article describes some of the tips and techniques used in the outdoor cultivation of cannabis. With this in mind, the team at
- How to Build a Self-Watering System for Your Outdoor GardenWe all love spending time in the garden. But creating your personal Eden is not as simple as planting in the spring and harvesting in
- PNW’s Top Fertilizer Picks of 2021We encounter countless questions about fertilizer at Pacific Northwest Garden Supply (PNW). Here’s one of the most common: what’s the best fertilizer to use? This,