Best Nitrogen Garden Fertilizers in 2026

Get your garden going with FoxFarm Grow Big, our liquid concentrate fertilizer that supports lush vegetative growth.

FoxFarm Big Bloom Liquid Plant Food is formulated for use on all plants and can be used every time you water. OMRI Listed and Registered CDFA Organic Input Material.

FoxFarm Tiger Bloom is a phosphorus fertilizer that contains nitrogen to support vigorous growth. FoxFarm Tiger Bloom is designed to encourage abundant fruit, flower and multiple bud development.

The FloraSeries is a hydroponic-based nutrient fertilizer system that helps fulfill your plants’ nutrient needs at every stage of growth

Nutrients included are FloraMicro, FloraBloom, and FloraGro

FloraMicro is rich in nitrogen, calcium, and chelated micronutrients to help support fast-growing crops during all growth stages

Down To Earth Rose & Flower Mix is a one pound box of all natural fertilizer with 4-8-4 formula and supplies nutrients for vigorous growth and sensational flowers

A special fertilizer blend that provides ample nitrogen for vigorous growth, extra phosphorus for beautiful blooms and potassium and trace elements for healthy plant stock

Great for starting edible bulbs, like garlic and onion, apply when planting your favorite new roses, bulbs, perennials and use throughout the season when new growth appears on existing plants

Improves soil structure: better aeration and water retention.

Non-toxic and natural. Safe for children, pets, and pollinators.

Comes in resealable bag.

All indoor and outdoor plants, tree, vegetables and surf

It feeds both through the roots and the leaves. This formula of nitrogen, phosphorus and potassium provides fast green-up and rapid leaf expansion

Indoors it is especially effective on foliage plants, keeping leaves green. A proven performer in the vegetable garden for generations

PLUMERIA PLANT FOOD: Nelson Plumeria and All Flowering Tropical Evergreen Plants Food featuring (NPK) Nitrogen (5%), Phosphate (30%), Soluble Potash K20 (5%). Balanced ingredients encourage regrowth after pruning. Contains five Nitrogen sources to ensure a constant feed. Higher Phosphorus produces more blooms, while added elemental Sulfur helps increase soil acidity. Specific micronutrients promote brilliant and colorful blooms.

TROPICAL PLANT FOOD: Excellent source of nutrients and minerals for in-ground and container grown trees, shrubs, evergreens including but not limited to: Plumeria, Frangipani, Lei Plant, Ground Orchids, Tree Ferns, Peace Lily, Crotons, Plumbago, Stephantis, Mexican Firebrush, Candletree, Ixora.

PATIO INDOOR OUTDOOR PLANT FERTILIZER: Helps promote more beautiful and lash green foliage growth due to balance nutrition. Important micronutrients allow plants to active maximum health.

Miracle-Gro LiquaFeed Advance Starter Kit with Garden Feeder, 16 oz. Bottle of LiquaFeed All Purpose Liquid Plant Food, and Dosing Spoon

Miracle-Gro LiquaFeed All Purpose Plant Food Refill Pack, (Liquid Plant Fertilizer) 16 oz.

USE ON: Use Flower-tone organic fertilizer for flowers like annuals, perennials, and roses. Flower-tone is the perfect flower food for fresh cut flowers. Promotes abundant blooms

CONTAINS: Flower-tone is a rich blend of the finest natural & organic ingredients enhanced with our exclusive Bio-tone formula; 3-4-5 low nitrogen fertilizer analysis with 5% calcium. Flower-tone is environmentally Safe - No sludges or toxic ingredients

WHEN / HOW TO USE: Best to use Flower-tone fertilizer for roses, annuals, perennials, monthly throughout the growing season. Apply to the soil around the drip line of the plant and water thoroughly. Flower-tone is ready to use and requires no mixing

- WORM CASTINGS ORGANIC FERTILIZER – Eden’s Best worm castings are as close to 100% castings as you can get. Check out our reviews to see why our products are chosen over others.

- 100% ORGANIC – Certified and guaranteed! Our organic fertilizer for vegetable gardens, flower gardens, potted plants, and general soil builder is 100% organic and we’re proud of it!

- GROW NATURALLY – No more worrying about the harmful side effects of chemical pesticides and fertilizers. Eden’s Best earthworm castings allow you to grow flourishing plants naturally, the way nature intended.

Easy Peasy Plants Urea is made with the highest quality nitrogen urea prills. Nitrogen boosts development of green matter of all your indoor flowers, lawn, and garden vegetables

Nitrogen is needed by every plant to product leave, stems, roots, blooms, and flowers. Easy Peasy Plants Urea Nitrogen provides the nutrients needed to produce lush greenery.

Wide application range from home garden, lawns, indoor and outdoor plantss to TIE-DYE PROJECTS

LOW MAINTENANCE: Our vine fertilizer is perfect for all homeowners! This slow release fertilizer only requires feeding every 14 days till blooming begins. Once blooming begins, you only need to feed your plants once a month.

PACKED WITH NUTRIENTS: Our well developed bougainvillea plant food has a 17-7-10 formula promotes the development of healthy colorful blooms, while maintaining the health of your plants. With 4 sources of nitrogen and nutrients for maintaining plant health, this fertilizer allows for extended periods between feedings. This fertilizer works with soil biology to provide your vines with the best fertilizer and nutrition possible, at the right time.

MAINTAIN YOUR PLANT'S HEALTH: Feel the benefits of a formula that was created to maintain your plants health. With added sulfur and gypsum, our formula helps create acidic soil to improve overall soil structure around the roots.

Contains chelated minor elements

CONTAINS: 20% Nitrogen

20% Phosphorus (P205)

Eco-friendly

Slow Release, feeds up to 3 months

Aids in root development

Phosphorus-free fertilizer blend with fine particle size that includes humic acid, which helps increase turf quality and reduce nutrient requirements

Contains MUtech coated slow release nitrogen to provide uniform growth and extended feeding

DG particles do not rely on a physical coating to release nutrients. Coated fertilizers (used by our competitors) are very susceptible to damage from mowers, resulting in premature nutrient release.

HUGE GROWTH: Photosynthesis Plus is formulated to grow massive fruits, vegetables, and herbs; As an all-natural liquid supplement, it maximizes the plant’s ability to use available light, allowing for larger blooms and more flavorful yields

FAST GROWTH: This unique formula enhances the photosynthesis process by enabling the plant to utilize more of the available light, increasing the conversion of CO2 into carbohydrates; This will help the plant grow faster due to the increased energy intake

MORE GROWTH: Photosynthesis Plus fixes nitrogen at the foliar and root zones; It builds biofilms around the root and through the solid/growth media to help protect roots and allow for more growth of the plant by increasing nutrient availability and uptake

Wholly Mackerel is a liquid plant nutrient derived from marine fish species

Wholly Mackerel provides readily available amounts of organic nitrogen, phosphorus and potassium to growing plants

FoxFarm's extra-strength fish fertilizer contains 20 different amino acids, 13 vitamins, and 8 minerals including manganese, iron, copper, and zinc

🌿【All Natural Kelp Bliss!】- Pure Norwegian Kelp Meal is an all natural and organic fertilizer composed of mulched seawood that’s been harvested fresh from the ocean! Using Kelp Bliss will revitalize your soil and give your plants all the potassium they need to grow strong, happy, and healthy!

🌹【Over 70 Essential Micronutrients!】- Plantonix Kelp Bliss contains essential micronutrients that help improve fertility! Every bag of pure Kelp Meal also contains essential minerals, carbohydrates, and amino acids to help with moisture retention, water retention, plant development, and root development!

🌱【Alleviates Plant Stress!】- Great for helping reduce stress to your plants caused by transplant shock and environmental hazards, such as fluctuations in extreme temperatures! Kelp Bliss also improves soil quality by increasing its water holding capacity, helping to provide your garden with more essential nutrients!

RAW Nitrogen is a macro element, in that it is essential nutrient for vegative growth and development. Nitrogen is the N in N-P-K ratios found on most fertilizers. RAW Nitrogen can easily and quickly solve nitrogen deficiency issues as it is immediately available to be taken up by the plant.

Easily mixes into water and is completely soluble.

BENEFITS: Great for treating individual deficiencies. The primary component in overall plant development. Essential for production of Chlorophyll, Amino Acids, and Enzymes

General purpose water soluble fertilizer for plants grown in soil.

Can be used in both soil and foliar applications.

Multiple sources of Nitrogen for staggered release.

Designed to promote bigger blooms and greener foliage on all potted plants

Features a 20-20-20 formula, with just the right balance of Nitrogen, Phosphate, and Soluble Potash

Provides your plants essential nutrients they need to grow strong and healthy

[Long Lasting, Less Work] - An easy one time granular application can feed your potted indoor or outdoor houseplant for several months, with all of the Nutrient release happening only when you water.

[Light Feeding Rate] - Our Balanced ratio of nitrogen, phosphorous, and potassium (NPK) will never over concentrate in the potting soil of your live succulent plants. It will feed your arid loving plants the optimal amount to insure healthy root development, Vibrant Colors, sturdy stem growth, and could contribute to bloom growing.

[Professionally Formulated]- This Blend contains balanced micronutrient and mineral ratios that are perfect for many succulent and cactus varieties like Jade, crown of thorns, lithops, pilea, snake plants, echeveria, aloe vera, string of pearls, and more.

COMPLETE MACRONUTRIENT PROFILE FOR PLANT NUTRITION: The combination of our Base A & B Bundle results in a complete feed for rapidly growing flowering plants and indoor plants. Our signature blend consists of Nitrogen, Phosphorus, Potassium, Calcium, Magnesium, and more.

EASY-TO-USE TWO-PART SYSTEM: Simple use both bottles at equal rates throughout the entire growing cycle, from the beginning of the vegetative stage until the end of the flowering stage. We recommend application with every watering for maximum results.

COMPATIBLE WITH ALL GROWING MEDIUMS: Our clean-running formula is suitable for all grow mediums, including potting soil for indoor plants, hydroponics, aquaponics, and coco coir cultivations.

Product 1: This all-natural, non-toxic alluvial planting media is fine-grained

Product 1: Aquascape premium potting media contains no peat moss or compost and is safe for fish.

Product 1: One bag covers 432 cubic inches

Superior Liquid Plant Food - MARPHYL Marine Phytoplankton is ideal as an outdoor and indoor plant fertilizer. It's an excellent vegetable fertilizer, houseplant fertilizer, and lawn fertilizer. It's great for your garden, greenhouse, and hydroponics. Enjoy gorgeous, colorful blooms with this exceptional flower food. Enhance soil quality and watch your trees, shrubs, vines, grass, plants, flowers, and vegetables thrive.

Naturally Boost Plant Health - Marine Phytoplankton are Microalgae full of nutrients, vitamins, and minerals. It's so much more than your average liquid plant fertilizer. MARPHYL's fertilizer for indoor plants and outdoor plants, grasses, trees, flowers and more, provides an astounding array of nutritional elements. Packed with vitamins, minerals, essential fatty acids, DHA, EPA, amino acids, chlorophyll, and a vast spectrum of phytochemicals, so your lawn, garden, and greenhouses will flourish

Organic & Sustainable - Our Liquid Marine Phytoplankton Soil Enhancer is an organic, all purpose plant food that is harvested 100% naturally. It's vegan, non-toxic, non-GMO & sustainably made with no preservatives making it safe for vegetable gardening, ground water, and pets. It replenishes your soil on a regular basis to ensure the continued growth and beauty of your vegetation. Our organic plant fertilizer will meet your every need and provide a safe environment for all gardening.

ABOUT THE PRODUCT: RAW Phosphorus contains 61% pure water Soluble Phosphate (P). This product also contains a small amount of Ammonium Nitrogen (9%) which plants can utilize during bloom. Phosphorus is particularly beneficial during the early rooting stage but also provides energy during fruit and flower production. RAW Phosphorus is ideal for boosting Phosphorus (P) levels, treating deficiencies and creating optimal recipe solutions. Works in conjunction with all nutrient and feeding programs.

RAW Phosphorus- Easily mixes into water and is completely soluble.

BENEFITS: Promotes fruit and flower production. A critical component in the storage of energy within the plant. It Promotes rooting and early plant vigor. Important to cellular division and development of new plant tissue.

Tiger Bloom

Nutrients: 2-percent nitrogen, 8-percent phosphorus, 4-percent potassium

Fast-acting, high phosphorus fertilizer with nitrogen

Starter solution for new plantings and transplants

For root growth, reduces transplant shock

Active Ingredients: Phosphate, Chelated Iron, Derived From Phosphoric Acid, Ferric Edta

OMRI ​ORGANIC LISTED HYDROLYZED FISH FERTILIZER: Indian River Organics Liquid Fish Fertilizer is an all-natural high quality fish fertilizer that gives excellent plant growth. Plants receiving our organic fish fertilizer out-perform in every category, they are much healthier and more resistant to heat, drought, and cold. This means they bloom more, produce bigger fruit, and taste better. With our organic liquid fish fertilizer, grass spreads faster and needs less maintenance.

PACKED WITH AMINO ACIDS & MICRO NUTRIENTS: The all-natural fish fertilizer for vegetables, plants, and more provide much more than N-P-K (Nitrogen, Phosphorus and Potassium) found in synthetic fertilizers. This organic liquid fish fertilizer provides a comprehensive mix of amino acids & micro nutrients and minerals all in a usable form perfectly suited for maximum efficiency of uptake for your plants. The organic fish fertilizer stimulates water penetration and increases nutrient assimilation.

OPTIMAL PLANT GROWTH & HEALTH AT HOME OR COMMERCIALLY: Used in low concentrations, plant fertilizer liquid organic acts as an efficacious growth promoter. Our liquid vegetable fertilizer is used extensively on a commercial basis, as well as at home for gardeners as an organic soil conditioner. This organic liquid fish fertilizer will lead to healthier crop yields and general plant well being.

Ideal for all-season; no-expiration date; all-purpose fertilizer / plant food.

4% nitrogen, 2% phosphorus, 2% potassium; pH level 6

Derived from chicken manures; processed with fermentation, high-temperature sterilization, 6:1 concentration, dried and pelleted; unlike raw, processed manures will not burn roots; water soluble; granular form.

One application feeds your plants up to a 16 week grow cycle

Programmed release N-P-K for Veg and Bloom

4 - 6 weeks of heavy Nitrogen for leafy greens in Veg