Top Biological Fertilizer Reviews

Down to Earth Liquid Fish & Kelp 2-4-1, 1 Quart

  • An all-purpose natural-based liquid fertilizer made from pure hydrolyzed fish protein and a concentrated extract of cold water Ascophyllum nodosum seaweed.
  • Ideal for enhancing plant development and promoting longer growing periods for all garden vegetables, herbs, fruits, vines and ornamentals.
  • Provides three plant macronutrients and stimulates soil biological activity.
  • Most effective as a soil drench and is designed for plants grown in garden soils, potting soils or soilless media.
  • Listed by the Organic Materials Review Institute (OMRI) for use in organic production.
Check Stock

Jonathan Green (11355 Mag-I-Cal Plus Soil Food for Lawns in Acidic & Hard Soils – Soil Amendment for Grass (15,000 Sq. Ft.)

  • RAISES SOIL PH – Lawns thrive in soil with pH levels between 6.2 and 7.0. If soil pH is below this range grass becomes light green, weeds persist, and fertilizer nutrients aren’t fully absorbed. Mag-I-Cal Plus rapidly and efficiently raises soil pH..
  • LOOSENS HARD SOILS – Mag-I-Cal Plus helps break up clay and compacted soils. This improves root penetration and promotes growth by increasing biological activity and releasing nutrients trapped in the soil..
  • ENCOURAGES NUTRIENT ABSORPTION – Mag-I-Cal Plus increases the ability of your grass to utilize nutrients in the soil. Lawn fertilizer is wasted when soil pH is not balanced. When the soil chemistry is balanced, the nutrients are able to be absorbed..
  • CONTAINS CALCIUM – Calcium is vital to many grass plant functions. It’s readily available in Mag-I-Cal Plus for plant uptake or pH adjustment..
  • COMPLETE COVERAGE – This 54 lb bag covers up to 15,000 sq. ft and can be used in spring, summer, or fall. Use the Jonathan Green Pro pH & Moisture Soil Tester (11100) or Soil pH Test Kit for Lawns (11595) to measure the soil pH of your yard..
Check Stock

MicroLife Citrus & Fruit 6-2-4 Professional Grade Granular Organic Biological Fertilizer 40 LBS

  • MOST COMPLETE NUTRITIONAL FERTILIZER DESIGNED FOR ALL CITRUS & FRUIT TREES: contains over 100 + minerals, vitamins, natural plant hormones and....
  • COMPLETELY NATURAL 100 % ORGANIC AND SAFE FOR ALL LIFE FORMS: slow release, 2% iron, will not burn and easy to use.
  • GROWS MOST BEAUTIFUL AND BOUNTIFUL CITRUS, FRUITS AND AVOCADO TREES: guaranteed to increase yields, more buds, fruits and better flavors..
  • BUILDS LARGER ROOT SYSTEMS AND ENHANCES PLANTS’ HEALTH: designed for all growers’ professional and beginners in mind who want dynamic plant....
  • MANUFACTURED FOR OVER 30 YEARS: MicroLife is one of the oldest and most accomplished manufacturer of all organic biological fertilizers in the U.S.....
Check Stock

MicroLife Citrus & Fruit 6-2-4 Professional Grade Granular Organic Biological Fertilizer 7 LBS

  • MOST COMPLETE NUTRITIONAL FERTILIZER DESIGNED FOR ALL CITRUS & FRUIT TREES: contains over 100 + minerals, vitamins, natural plant hormones and....
  • COMPLETELY NATURAL 100 % ORGANIC AND SAFE FOR ALL LIFE FORMS: slow release, 2% iron, will not burn and easy to use.
  • GROWS MOST BEAUTIFUL AND BOUNTIFUL CITRUS, FRUITS AND AVOCADO TREES: guaranteed to increase yields, more buds, fruits and better flavors..
  • BUILDS LARGER ROOT SYSTEMS AND ENHANCES PLANTS’ HEALTH: designed for all growers’ professional and beginners in mind who want dynamic plant....
  • MANUFACTURED FOR OVER 30 YEARS: MicroLife is one of the oldest and most accomplished manufacturer of all organic biological fertilizers in the U.S.....
Check Stock

Down to Earth Organic White Oyster Shell OMRI, 5 lb

  • Down to Earth Oyster Shell is a five pound box of all natural fertilizer and is listed by the Organic Materials Review Institute (OMRI) for use in organic production.
  • All-natural and high-quality source of the essential plant nutrient calcium, helping prevent calcium deficiencies that can dimish plant development.
  • Ancient oyster shells are carefully harvested and then ground into small, medium and coarse particles, providing a sustained release of this valuable nutrient.
  • With 35% calcium, Oyster Shell is great for use on lawns, outdoor containers, vegetable gardens, flower beds, trees, shrubs and row crops/acreage.
  • Calcium is very important to the biological processes of growing plants and aids in improving structure of soils and building optimum tilth.
Check Stock

Down to Earth Organic All Natural Oyster Shell Fertilizer, 1 lb

  • Down to Earth Oyster Shell is a one pound box of all natural fertilizer and is listed by the Organic Materials Review Institute (OMRI) for use in organic production.
  • All-natural and high-quality source of the essential plant nutrient calcium, helping prevent calcium deficiencies that can dimish plant development.
  • Ancient oyster shells are carefully harvested and then ground into small, medium and coarse particles, providing a sustained release of this valuable nutrient.
  • With 35% calcium, Oyster Shell is great for use on lawns, outdoor containers, vegetable gardens, flower beds, trees, shrubs and row crops/acreage.
  • Calcium is very important to the biological processes of growing plants and aids in improving structure of soils and building optimum tilth.
Check Stock

MicroLife Ultimate 8-4-6 Professional Grade Granular Organic Fertilizer for All Vegetables Flowers Trees and Bushes 40 LBS

  • ULTIMATE AND MOST POWERFUL NUTRITIONAL MULTI-PURPOSE 100 % ORGANIC FERTILIZER: contains over 100 + minerals, vitamins, natural plant hormones and....
  • COMPLETELY NATURAL: 100% slow releases, 2% iron, will not burn and easy to use, does not contain poultry manure, repeat every 3-4 months..
  • GROWS MOST BEAUTIFUL PLANTS AND IMPROVES SOIL: increases yields, more buds, fruits and better flavors.
  • for all new and established vegetables,....
  • BUILDS LARGER ROOT SYSTEMS AND ENHANCES PLANTS’ HEALTH: designed for all growers’ professional and beginners in mind who want dynamic plant....
  • MANUFACTURED FOR OVER 30 YEARS: MicroLife is one of the oldest and most accomplished manufacturer of all organic biological fertilizers in the U.S.....
Check Stock

EarthPods Easy Indoor Plant Food - Best Organic Fertilizer Spikes - 100 Capsules – All Purpose (Great for Indoor House Plants + Outdoor Potted Flower Gardens, No Urea, Ecofriendly)

  • ...cactus, bamboo, bonsai or medical plants, etc..
  • EASY + FAST + COMPACT FOR EVERYONE: tired of big heavy fertilizer bags? 1 EarthPods tube = 100 concentrated organic flower &.
  • involving children in prime organic gardening activities (EarthPods are also pet + child + eco-friendly &.
  • release concentrated biological magic straight to root grow zone. FEED PLANTS IN ALL LOCATIONS: indoor &.
  • NO MEASURING + NO SMELL + NO DIRTY HANDS: grab an EarthPod &.
Check Stock

Wow Soluble DS-80 Humic and Fulvic Acid Organic Fertilizer (10 Pound )

  • MarkNature Humic Acid extracted from high grade leonardite, leonardite provides a very high content of humic and fulvic acids and natural biological active trace elements. With the most concentrated humate and highest activity, totally dissolvable in water, it can be easily absorbed by plant, lower the application cost. It is convenient for growers to apply with various methods..
  • MarkNature Humic Acid has excellent water solubility, it can be wildly used in different water source, even in hard water, and it can be used by drip irrigation and leaf spray. It does not block the nozzle. Small - molecule humic acid is easy to be absorbed and with high utilization rate..
  • MarkNature Humic Acid can be dissolved in acidic aqueous solution with pH=1.5. The solution will not produce precipitation. Furthermore, with good compatibility, it can mix with NPK and some medium and trace elements, and it is convenient to make liquid fertilizers in various formulations. It is an excellent raw material for formula fertilizers..
  • MarkNature Humic Acid can increase the utilization of mineral fertilizers in soil and the capacities of the earth water holding, promotes soil structure and root development, enhances soil cation exchange capacity (CEC) and aeration condition, improv....
Check Stock

Jobes Houseplant Food Spikes (1) (Multi)

  • Jobe's Houseplant Fertilizer Spikes 13-4-5 Fertilizer spikes feed trees at the roots, where they need it most.
  • Slow release, Pre-measured fertilizer spikes nourishes at the roots.
  • Time release fertilizer for all houseplants.
  • Indoor Use, Easy to use fertilizer spikes.
  • No wasteful runoff, no mess, hazards or smells.
  • Provides houseplants with continuous slow-release nourishment at their roots.
Check Stock

Fluval Water Treatment for Aquariums Bundle Biological Cleaner and Biological Enhancer

  • Biological Cleaner reduces organic waste and overall tank maintenance by effectively cleaning interior surfaces.
  • Biological Enhancer infused with a powerful team of beneficial bacteria that immediately inoculates aquarium water.
  • Biological Enhancer eliminates ammonia and nitrite.
  • Water treatments are suitable for use in both freshwater and saltwater aquariums.
  • Includes one 8.4 oz. bottle Fluval Biological and one 8.4 oz. bottle Fluval Biological Enhancer.
Check Stock

9pcs Plant Rooting Ball, Plant Root Device Growing Box, Assisted Cutting High-Pressure Propagation Ball, Reusable Grafting Controller Air-Layering for Plants Asexual Reproduction(3L+3M+3S, Black)

  • Insert the fertilizer box containing the fertilizer into the soil and water it..
  • The fertilizer tank can be reused and can be used for a long time..
  • Suitable for bonsai, flowers, orchids and small plants, save fertilizer..
  • The fertilizer box is easy to use, just insert it into the soil and put fertilizer in the fertilizer box..
  • The fertilization box can be used to place fertilization tablets, which is simple and convenient to use, prevent your fertilizer from being eaten by other small animals..
Check Stock

Certified Wheatgrass Seeds 1LB

  • GREEN BRIGHT LETTUCE: Greenway Biotech lettuce fertilizer has an ample supply of chelated micronutrients, ensuring that your heads of lettuce are....
  • 100% WATER SOLUBLE: This type of hydroponics fertilizer comes in a powdered form and is designed to dissolve quickly in water. Gardeners can stir it....
  • PREMIUM INGREDIENTS: This vegetable fertilizer professionally formulated with quality ingredients and Contains 8% Nitrogen, 15% phosphorous, 36%....
  • IMPROVES SOIL QUALITY: Natural fertilizer for vegetables is an effective starter fertilizer for both soil and hydroponics use. Also an excellent....
  • ECO - FRIENDLY: Our water soluble fertilizer boosts plant food growth because it is free of heavy metals or materials. Lettuce and other greens need....
Check Stock