Our readers keep the lights on and the potting soil stocked. As an Amazon Associate, I earn from qualifying purchases.
Specs are compiled from manufacturer listings and verified buyer reviews and can change over time — please confirm the key details on the product page before buying.
You want a single bag or bottle that feeds tomatoes, flowers, houseplants, and shrubs without turning your soil into a chemistry experiment. This guide shows you which one to grab so every plant — from the vegetable bed to the snake plant on the shelf — gets the right nutrients without second-guessing ratios.
I’m Rikta — the founder and writer behind Lawn Gear Lab. This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.
For the full picture on each product’s slow-release schedule, liquid feeding speed, and the NPK (nitrogen-phosphorus-potassium) ratio balance that best suits your garden, read the detailed breakdowns below. This is the honest evaluation of the best all purpose organic fertilizer.
Our Picks at a Glance
How To Choose The Best All Purpose Organic Fertilizer
The “all purpose” label can lead you astray if you ignore the three numbers on the bag — the NPK (nitrogen, phosphorus, potassium) ratio. That sequence tells you exactly what the fertilizer prioritizes: the first number (N) fuels leaf growth, the second (P) builds strong roots and flowers, the third (K) supports overall plant health and disease resistance. An all-purpose blend ideally keeps these in a balanced range so you don’t burn one plant while starving another.
Granules vs Liquids: Which Fits Your Routine?
Granular fertilizers (like Down To Earth or Espoma) release nutrients slowly over weeks as soil microbes break them down — you apply once, water in, and the feed lasts. Liquid fertilizers (like the Grow Queen or Alaska Fish) work in days, giving a quick green-up and fast root response, but they require mixing with water every watering or every few weeks. If you want a “set it and water it” approach for outdoor beds, choose granules. If you need instant results for indoor pots or a quick boost for vegetables, choose liquid.
Why OMRI Certification Matters
OMRI (Organic Materials Review Institute) listed means the product is approved for use in certified organic production. If you follow organic gardening rules or simply want to avoid synthetic chemicals, look for “OMRI Listed” on the label. The products here — Down To Earth, FoxFarm, Alaska Fish, and Jobe’s — all carry that certification, so you can use them without worrying about harmful residues in your soil or food.
Quick Comparison
| Model | Best For | NPK Ratio | Item Form | Weight/Size | Amazon |
|---|---|---|---|---|---|
| Down To Earth All Purpose Mix★ Best Overall | Vegetable transplants & containers | 4-6-2 | Granules | 5 lb | Amazon |
| Grow Queen Organic LiquidBest Liquid | Indoor houseplants & tropicals | 5-5-5 | Liquid | 8 oz (treats 50 gal) | Amazon |
| Espoma Garden-tone | Cool/warm season vegetables | 3-4-4 | Granules | 4 lb (pack of 2) | Amazon |
| Espoma Plant-tone | Flowers, trees & shrubs | 5-3-3 | Granules | 4 lb (pack of 2, 128 oz total) | Amazon |
| FoxFarm Happy Frog | All plants with soil microbes | 6-4-5 | Granules | 4 lb | Amazon |
| Alaska Fish Fertilizer | Large gardens & containers | 5-1-1 | Liquid | 115 fl oz (8.8 lb) | Amazon |
| Jobe’s Organics All Purpose | Big beds & budget-friendly bulk | 4-4-4 | Granules | 16 lb | Amazon |
In‑Depth Reviews
1. Down To Earth All Natural Fertilizers Organic All Purpose Tomato & Vegetable Mix
Our pick — over 4.5★ from 900+ verified ratings; the strongest balance of quality and price.
The 4-6-2 granular feed that prioritizes phosphorus for root-heavy transplants like tomatoes and peppers.
This five-pound box from Down To Earth uses a 4-6-2 NPK (nitrogen, phosphorus, potassium) formula. The higher phosphorus (6) builds strong roots and early fruit sets — exactly what you need when moving seedlings into the ground or a container. The granules are gentle and non-burning, so you can work them into the soil around vegetables, herbs, flowers, trees, and shrubs without killing tender roots.
The ingredient list reads like a soil scientist’s pantry: fish bone meal, blood meal, feather meal, rock phosphate, langbeinite, greensand, humates, and kelp meal. Each one feeds a different part of the soil food web. It carries OMRI (Organic Materials Review Institute) listing for organic production, which means it meets the strict rules for certified organic gardening. Buyers report that this mix works particularly well on tomato beds and container peppers, delivering steady growth without the sudden green flush that synthetic feeds cause.
The 4-6-2 ratio here is noticeably higher in phosphorus than the 3-4-4 of Espoma Garden-tone which makes Down To Earth the sharper choice for fruiting crops that need a root boost early in the season. At 5 pounds, it is also at 5 pounds versus the 4-pound Espoma bags, giving you more coverage per box.
What Makes It Stand Out
- Higher phosphorus (6) fuels rooting and flowering in transplants
- OMRI listed for certified organic gardening
- 5-pound box offers generous coverage for medium beds
Consider This First
- Not designed as a liquid feed — requires soil incorporation and watering
- 4-6-2 is lower in nitrogen than the FoxFarm 6-4-5, so leafy greens may need a secondary boost
Reach for this if: you transplant a lot of tomatoes, peppers, and herbs and want a single granular feed that roots them fast without synthetic additives.
Look elsewhere if: you need instant liquid feeding for indoor foliage or prefer a ready-to-use bag that doesn’t require measuring — this needs scooping and watering in.
2. Grow Queen Organic Liquid Indoor Plant Food 5-5-5
The 5-5-5 liquid that feeds every houseplant from monstera to snake plant without any odor mess.
This liquid fertilizer from Grow Queen gives you a true 5-5-5 NPK (nitrogen, phosphorus, potassium) balance — equal support for leaves, roots, and overall vigor — in an 8 ounce bottle that treats up to 50 gallons of water. It mixes instantly, so you can pour it into your watering can and feed the entire indoor collection in minutes. The formula uses cold-processed Ecklonia maxima sea kelp, which according to the maker is rich in auxins (plant growth hormones) and trace minerals that encourage root expansion and deeper green leaves.
Unlike granular options, this is instant-acting: you see visible results in days, not weeks. It is also completely odor-free, which matters when you are feeding plants inside your living space. The maker recommends it for every species — monstera, pothos, philodendron, snake plant, peace lily, herbs, and even tropicals — and the 5-5-5 ratio is gentle enough that you can use it with every watering without risk of burn. One 8-ounce bottle treats 50 gallons total, so it lasts through multiple seasons of weekly feeding. Owners mention that their foliage plants showed a richer green within a week of switching to this liquid formula.
Compared to the Alaska Fish Fertilizer with its 5-1-1 ratio (very high nitrogen, very low phosphorus), the Grow Queen’s 5-5-5 provides phosphorus and potassium at 5 each versus Alaska’s 1 each — a big advantage if you want blooms and root growth alongside leaf development.
Why It Works for Indoor Gardens
- 5-5-5 balanced NPK supports foliage, roots, and flowers equally
- Odor-free and safe around pets and kids
- One bottle treats 50 gallons — economical for a large plant collection
Where It Has Limits
- Liquid requires regular mixing — not a set-and-forget granular feed
- Not ideal for outdoor beds because you would need many bottles for the same coverage as a 16-lb bag
Best suited for: indoor plant enthusiasts with a mixed collection of tropicals, aroids, and herbs who want a single, clean, instant liquid that feeds everything without smell.
Not the right pick if: you want to feed a large vegetable garden or prefer a slow-release granular that you apply once and forget for a month.
3. Espoma Organic Garden-tone 3-4-4 (Pack of 2)
The 3-4-4 granular feed that targets leafy greens and fruiting vegetables across the entire growing season.
Espoma Garden-tone is built specifically for vegetables — both cool-season crops like lettuce, kale, and cabbage, and warm-season ones like tomatoes, peppers, squash, and melons. The 3-4-4 NPK (nitrogen, phosphorus, potassium) ratio is modest on nitrogen but rich in phosphorus and potassium, which helps your plants produce fruit and resist stress rather than just growing tall green leaves. It also contains 5% calcium, which is vital for preventing blossom-end rot in tomatoes and peppers.
This pack gives you two 4-pound bags for a total unit count of 64.0 ounces. The granules are ready to use straight from the bag — no mixing required — and you simply sprinkle them around the drip line of each plant, then water thoroughly. Espoma adds its exclusive Bio-tone formula, a blend of beneficial microbes that help roots absorb nutrients more efficiently. The Garden-tone is approved for organic gardening and registered as an Organic Input Material, so it meets organic production rules. One reviewer noted that their pepper plants produced noticeably thicker stems and more fruit after switching to this monthly feeding schedule.
At a 3-4-4 mixing ratio, the phosphorus is lower than the Down To Earth 4-6-2 — but Down To Earth actually has more phosphorus overall because its numbers are higher. Garden-tone’s edge is the dedicated vegetable focus and the added calcium.
Strong Points for Gardeners
- Contains 5% calcium to prevent blossom-end rot in tomatoes
- Approved for organic production with Bio-tone microbes
- Ready to use — dry granules, no mixing, no odor
Areas to Check
- 3-4-4 is lower in nitrogen than the FoxFarm 6-4-5 or the Plant-tone 5-3-3
- Two bags weight only 4 lb each, so you may need multiple packs for large beds
Ideal for: vegetable gardeners who want a dedicated formula for both leafy greens and fruiting crops, with calcium built in for disease prevention.
Consider another if: you need a single all-purpose feed for flowers and trees too — the Plant-tone below covers a broader range.
4. Espoma Organic Plant-tone 5-3-3 (Pack of 2)
The 5-3-3 granular feed that is truly all-purpose — covering flowers, vegetables, trees, and shrubs in one bag.
Espoma Plant-tone is the brand’s flagship all-purpose organic plant food, and this pack gives you two 4-pound bags with a combined unit count of 128.0 ounces — double the 64.0 ounces of the Garden-tone pack. The 5-3-3 NPK (nitrogen, phosphorus, potassium) ratio puts nitrogen ahead for leaf growth while still providing enough phosphorus and potassium for flowers and roots. The 5% calcium is included here too, helping prevent blossom-end rot and strengthening cell walls across all plants.
Use it on annuals, perennials, roses, tomatoes, peppers, squash, lettuce, trees, and shrubs. The natural organics break down slowly, building a long-lasting reservoir of nutrients in the soil rather than giving a quick green flush. It is approved for organic gardening and carries the Espoma Bio-tone microbe formula to improve nutrient uptake. Buyers appreciate that they can feed an entire yard — flowers, vegetable garden, and ornamental shrubs — from the same bag without worrying about over-fertilizing any one zone. Apply in spring and fall for trees and shrubs, or monthly during the growing season for flowers and vegetables.
what separates it
- 128 oz total coverage — the largest unit count among Espoma bags here
- 5-3-3 with calcium suits both flowers and vegetables
- Slow-release long-term feeding — apply less often
Know Before You Buy
- Lower phosphorus than the Down To Earth 4-6-2, so not ideal for root-heavy transplants alone
- Granular format needs watering in — not as fast as liquid
Reach for this if: you have a mixed landscape — flowers, vegetables, trees, and shrubs — and want one bag that feeds everything from spring to fall without mixing.
Look elsewhere if: your primary focus is a single crop type (like heavy fruiting tomatoes) that would benefit from a higher phosphorus ratio.
5. FoxFarm Happy Frog All Purpose Fertilizer 6-4-5
The 6-4-5 granular feed with active soil microbes that pushes green growth and root health simultaneously.
FoxFarm’s Happy Frog All Purpose Fertilizer combines a 6-4-5 NPK (nitrogen, phosphorus, potassium) ratio with beneficial soil microbes and mycorrhizal fungi — the same microorganisms that form symbiotic partnerships with plant roots. The 6% nitrogen gives you more leaf-driving power than any other product on this list, which means faster green-up on vegetables, flowers, and ornamental plants. The 4% phosphorus and 5% potassium provide balanced support for roots and overall plant vigor.
The granular format is slow-release, so you apply it once and the microbes work with the soil to release nutrients over time. It is OMRI Listed for organic gardening, and the manufacturer recommends it for a wide range of plants — from productive vegetables to ornamental flower beds. One buyer mentioned that their tomato plants responded with noticeably thicker stems and darker leaves within two weeks of application. This is a ready-to-use feed for both new transplants and established garden beds, with clear instructions on the bag for different planting types.
The 6-4-5 ratio provides nitrogen at 6% versus the Grow Queen’s 5%, making Happy Frog the stronger choice for leafy greens and rapid foliage growth — at the cost of a slightly lower phosphorus number for bloom-heavy plants.
Why It Excels
- Highest nitrogen (6) among all picks — best for green leafy growth
- Contains beneficial soil microbes and mycorrhizal fungi for root health
- OMRI Listed for organic gardening confidence
Consider This
- 4 lb bag covers a medium area — may need multiple for large vegetable beds
- Not a liquid — requires soil incorporation and watering for activation
Best for: gardeners who grow a mix of vegetables and ornamentals and want a single granular feed that boosts green growth and builds soil life with microbes.
Not the best for: heavy bloom production where a higher phosphorus ratio (like the Down To Earth 4-6-2) would serve better.
6. Alaska Fish Fertilizer OMRI Listed 5-1-1
The 5-1-1 liquid fish fertilizer that covers 1000 square feet and feeds everything from vegetables to shrubs.
Alaska Fish Fertilizer is a liquid concentrate made from fish — a natural source of nutrients that has been trusted by generations of gardeners. The 5-1-1 NPK (nitrogen, phosphorus, potassium) ratio is very high in nitrogen, making it a strong choice for green leafy growth, but very low in phosphorus and potassium, so it works best as a general tonic for foliage rather than a bloom booster. Each bottle holds 115 fluid ounces, weighs 8.8 pounds, and covers up to 1000 square feet of garden space — the widest coverage of any liquid option here.
You mix it with water and apply every 3 weeks during the growing season for best results. It is OMRI Listed for organic gardening, and the manufacturer promises it won’t burn plants when used as directed. The formula is plant-safe and enhances soil by feeding the microbes that thrive on organic matter. Customers note the fishy smell fades quickly after application and that their vegetable plants look notably greener within days. This is a good choice for a large vegetable garden, container plants, fruits, roses, shrubs, and trees — basically any plant that needs a nitrogen lift.
The 5-1-1 ratio has 80% less phosphorus than the 5-5-5 of the Grow Queen liquid, so it is not ideal for flower or fruit production without supplementing with a bloom fertilizer.
Where It Shines
- 115 fl oz covers up to 1000 square feet — best value for large gardens
- OMRI Listed for certified organic use
- Gentle formula won’t burn plants when mixed as directed
Consider This First
- Very low phosphorus (1) — not suited for flowering or fruiting crops alone
- Fish-based odor during mixing, though reviewers point out it fades quickly
Reach for this if: you have a large vegetable garden, orchard, or shrub border and want an economical liquid that feeds green growth across 1000 square feet.
skip it if: you need a balanced feed for blooms and fruit — pair it with a phosphorus supplement or choose a higher P formula.
7. Jobe’s Organics Granular All Purpose Fertilizer 4-4-4 (16 lb)
The 4-4-4 balanced 16-pound bag that delivers bulk feeding for the biggest gardens without draining your wallet.
Jobe’s Organics All Purpose Fertilizer offers a perfectly balanced 4-4-4 NPK (nitrogen, phosphorus, potassium) ratio in a 16-pound bag — the heaviest and most economical option on this list. The equal numbers mean you get the same moderate support for leaves, roots, and overall health, making this a true one-size-fits-most feed for vegetables, flowers, shrubs, and trees. It is OMRI Listed for organic gardening, so you can use it in certified organic beds without worrying about synthetic chemicals.
The granules are easy to measure and apply directly to the soil. You should apply every 2-3 weeks during the growing season, or as needed. The manufacturer says the formula is designed to avoid wasteful runoff, mess, hazards, and smells — so you can store the resealable bag in the garage without lingering odor. This is a practical, no-fuss choice for gardeners who need to cover a lot of ground. One owner reported that their rose bushes put out steady new growth throughout the season with this balanced feed.
The 4-4-4 ratio has nitrogen at 4% versus the Grow Queen’s 5%, but the sheer volume of the 16-pound bag means you are not sacrificing coverage for balance.
Strong Points
- 16-pound bag offers the best bulk value per square foot
- Balanced 4-4-4 ratio works for vegetables, flowers, trees, and shrubs
- OMRI Listed for organic gardening with no synthetic chemicals
Things to Note
- Requires application every 2-3 weeks — not as long-lasting as some slower-release granules
- 4-4-4 is moderate across all nutrients — not tune for any single plant type
Reach for this if: you maintain a large vegetable garden, flower beds, and shrubs and need a bulk, budget-friendly organic granule that feeds everything with balanced nutrition.
Look elsewhere if: you want a specialized high-phosphorus formula for tomatoes and peppers, or a fast-acting liquid for houseplants.
Understanding the Specs
NPK Ratio (Nitrogen-Phosphorus-Potassium)
The three numbers on any fertilizer bag — for example, 4-6-2 — tell you the percentage by weight of nitrogen (N), phosphorus (P), and potassium (K). Nitrogen drives leafy green growth, so a high first number like the 6 in FoxFarm Happy Frog helps foliage expand quickly. Phosphorus supports root development and flower/fruit production, which is why the Down To Earth 4-6-2 puts that middle number highest. Potassium strengthens overall plant health and disease resistance. An all-purpose fertilizer keeps these in a moderate range like 4-4-4 or 5-3-3 so you can feed everything without overdoing one nutrient.
Granules vs Liquids
Granular fertilizers (like Espoma, Down To Earth, FoxFarm, and Jobe’s) release nutrients slowly over several weeks as soil microbes and moisture break them down. You apply them to the soil, water them in, and the feeding lasts. Liquids (like the Grow Queen and Alaska Fish) mix instantly with water and get absorbed by roots within days, giving a fast green-up but requiring more frequent application — some at every watering, others every 2-3 weeks. Choose granules for a set-it-and-forget approach outdoors; choose liquids for quick results on indoor plants or fast corrections.
FAQ
Can I use an all-purpose organic fertilizer on indoor houseplants?
What does OMRI listed mean for my garden?
How often should I apply granular organic fertilizer?
Will an all-purpose fertilizer work for my tomato plants?
How much does a 4-pound bag of granules cover?
Can I mix liquid and granular organic fertilizers together?
What is the difference between 4-4-4 and 5-3-3 ratios?
Is it safe to use fish fertilizer indoors?
How long does a 16-pound bag last?
Can I use all-purpose organic fertilizer on my lawn?
Final Thoughts: The Verdict
For most buyers, the best all purpose organic fertilizer winner is the Down To Earth All Purpose Mix because the 4-6-2 ratio gives you a phosphorus boost for root-heavy vegetables and transplants while the 5-pound box provides solid coverage at a mid-range investment. If you need quick liquid feeding for a large indoor plant collection, grab the Grow Queen 5-5-5 — it is odor-free, instant-acting, and treats 50 gallons. And for budget-conscious gardeners covering big beds, the Jobe’s Organics 4-4-4 16-pound bag gives you the most balanced nutrition per pound without stretching your wallet.
How We Picked
We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.
Sources & Methodology
Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of July 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
As an Amazon Associate, Lawn Gear Lab earns from qualifying purchases. This does not affect which products we feature.