Best Fertilizer For All Plants: 10 Options Compared

#1 · Best Overall

1. Miracle-Gro Water Soluble

• Weight: 1.5 lb
• Form: Powder

Best for: Mixed Indoor-Outdoor Gardens.

Why it ranks #1: Covers indoor and outdoor plants, including houseplants, vegetables, and trees; its 24-8-16 powder starts working instantly when mixed for feeding.

A water-soluble powder that feeds both indoor and outdoor plants is this formula’s defining advantage, letting gardeners use one product across houseplants, flowers, vegetables, roses, trees, and more. Its 24-8-16 NPK formula starts working instantly, making it a fit for people seeking a quick nutrient boost rather than a slow-release feeding schedule.

The water-soluble powder can be used indoors and outdoors, including in-ground plantings, so gardeners can cover a mixed collection with one formula. It starts working instantly, which suits buyers seeking a quick boost at feeding time. For outdoor use, the supplied directions identify a Miracle-Gro Garden Feeder method; the product can also be stored closed in a dry spot. When used as directed, it is stated not to burn plants, though preparing a soluble feed is part of its workflow.

Skip it if you want up to six months between applications; Osmocote Smart-Release Plant Food Plus Outdoor and Indoor feeds for up to six months.

Choose this powder if your garden spans indoor pots and outdoor plantings and you want an instantly working, water-soluble feed. It suits hands-on feeding routines better than buyers seeking a single application to last for months.

Listed on Amazon as: Miracle-Gro Water Soluble All Purpose Plant Food, 1.5 lb.

#2 · Longest Feeding

2. Osmocote Smart-Release

• Weight: 16 oz
• Form: Granules

Best for: Long-Interval All-Setting Feeding.

Why it ranks #2: Works across indoor and outdoor settings and lists 11 essential nutrients, with one application feeding plants for up to six months.

Feeding for up to six full months after one application is this granular fertilizer’s strongest practical distinction, giving busy gardeners fewer scheduled feeding sessions. It contains 11 essential nutrients and is listed for virtually all plants in containers, raised beds, and in-ground gardens, both indoors and outdoors.

The resin-coated granules release nutrition over time, and the stated feeding period reaches up to six months, which can simplify maintenance across a season. With 11 essential nutrients, the formula is listed for houseplants, flowers, vegetables, trees, shrubs, and roses. Its use spans indoor and outdoor settings, including containers, raised beds, and in-ground gardens, so one product can cover varied planting locations. Buyers should note that this is a granular product, rather than a liquid feed for mixing into a watering can.

Skip it if you want a liquid fertilizer for hydroponics; MARPHYL All-Purpose Plant Food is listed for hydroponic systems.

This suits gardeners who prefer infrequent feeding across indoor pots and outdoor beds, with one granular application lasting up to six months. Choose it for that extended interval, not if you specifically want a liquid feeding workflow.

Listed on Amazon as: Osmocote Smart Release Plant Food Plus Outdoor and Indoor1, 1 lb.

#3 · Broadest Growing Uses

3. MARPHYL All-Purpose

• Weight: 0.53 kg
• Form: Liquid

Best for: Organic Hydroponic And Soil Use.

Why it ranks #3: Lists indoor and outdoor plants, succulents, vegetables, and hydroponics, with balanced macro- and micronutrients in an organic liquid formula.

Use across soil gardens and hydroponic systems distinguishes this organic liquid fertilizer, giving growers with different setups a single listed option. It provides balanced macro- and micronutrients and is described as supporting soil quality, strong roots, vibrant foliage, and blooms across indoor and outdoor plants, including succulents and vegetables.

The stated indoor-and-outdoor range includes flowers, vegetables, succulents, and bamboo, while hydroponics extends its listed compatibility beyond conventional soil growing. Its balanced macro- and micronutrients pair with soil-enhancing claims, offering a practical fit for buyers tending both container plants and garden beds. The easy-to-use liquid form can be applied to container plants, raised beds, and outdoor gardens. Because the product is organic and intended for all-season feeding, it can serve gardeners seeking that approach across changing planting settings.

Skip it if you prefer a granular feed that can last up to six months; Osmocote Smart-Release Plant Food Plus Outdoor and Indoor has that stated duration.

This is a fit for growers moving between soil containers, outdoor beds, and hydroponic systems who want an organic liquid with broad plant coverage. Follow its handling and storage cautions, especially keeping it away from heat and flames.

Listed on Amazon as: MARPHYL All-Purpose Plant Food – Organic Nutrient-Rich Fertilizer & Soil Enhancer for Indoor & Outdoor Flowers, Vegetables, Succulents, Bamboo & Hydroponics

#4 · Balanced Liquid

4. ASTEVORA Liquid 10-10-10

• Weight: 8 oz
• Form: Liquid

Best for: Balanced Liquid NPK Feeding.

Why it ranks #4: Its 10-10-10 liquid formula includes seaweed kelp extract and chelated iron, and the listed uses include lawns, vegetables, indoor plants, and flowers.

An equal 10-10-10 NPK ratio gives this liquid fertilizer its clearest distinction, offering a balanced nutrient profile for gardeners feeding lawns, vegetables, indoor plants, and flowers. The formula also lists seaweed kelp extract and 6% chelated iron, making it a candidate for buyers who want those named ingredients in one liquid product.

The 10-10-10 balance supplies equal listed percentages of nitrogen, phosphorus, and potassium, while seaweed kelp extract and 6% chelated iron add two further named ingredients. Its liquid form suits growers who prefer a diluted feed: the supplied directions say to mix 0.5–1 ounce in 1 gallon of water. The stated range of uses includes lawns, vegetables, indoor plants, and flowers, so one bottle can serve several plant settings, provided buyers follow the dilution directions.

Skip it if you want granules rather than a measured liquid dilution; GARDENWISE 10-10-10 Plant Fertilizer Slow Release is a granular option.

This fits growers who want a liquid 10-10-10 formula with kelp extract and chelated iron for several plant types. Factor in measuring and dilution, and consider whether its listed uses match your garden.

Listed on Amazon as: ASTEVORA 10-10-10 All Purpose Plant Food, Liquid Fertilizer, 8oz

#5 · Slow-Release Granules

5. GARDENWISE Granular 10-10-10

• Weight: 16 oz
• Form: Granules

Best for: Extended-Interval Granular Feeding.

Why it ranks #5: Balanced 10-10-10 granules suit outdoor gardens and potted plants, with the product listing up to eight weeks of sustained nutrition.

Up to eight weeks of sustained nutrition is the main draw of this balanced 10-10-10 granular fertilizer, reducing how often outdoor gardeners need to reapply. Its stated range includes vegetable gardens, fruit trees, shrubs, flowers, lawns, and potted plants, making it useful for buyers who want one slow-release formula across varied plantings.

The equal 10% nitrogen, phosphate, and potash content gives the granules a balanced profile for the listed mix of vegetables, trees, shrubs, lawns, and flowers. Its slow-release formula provides up to eight weeks of nutrition, so it can reduce the frequency of feeding compared with a routine requiring closer intervals. Application involves spreading granules evenly over soil and watering thoroughly afterward. That soil-based workflow makes it less suited to someone seeking an immediately applied liquid feed, but it can serve outdoor beds and potted plants.

Skip it if you want a liquid feed for hydroponics; MARPHYL All-Purpose Plant Food is listed for hydroponic systems.

Gardeners feeding a mix of beds, shrubs, and potted plants may value the broad listed use and up-to-eight-week release period. Plan to spread it over soil and water thoroughly, rather than expecting a liquid application.

Listed on Amazon as: 10-10-10 Plant Fertilizer Slow Release – 10 10 10 All Purpose Granular Garden Fertilizer for Vegetables, Tomato, Arborvitae, Shrubs, Rose, Flowers, Fruit, Fig Trees (1/2 Quart)

#6

6. Espoma Plant-tone

• Weight: 4 lb
• Form: Granules

Best for: Organic Beds And Shrubs.

Why it ranks #6: This 5-3-3 natural and organic granular food is listed for flowers, vegetables, trees, and shrubs, with nutrients that break down slowly.

Slow breakdown of natural and organic ingredients gives Espoma Plant-tone a long-lasting nutrient reservoir, distinguishing it from quick-acting soluble feeds. Its granular 5-3-3 formula is listed for flowers, vegetables, trees, and shrubs, suiting gardeners who prefer an organic soil application for a varied outdoor planting mix.

The granules break down slowly, creating a longer-lasting nutrient reservoir rather than an instant liquid boost. Plant-tone is listed for annuals, perennials, roses, tomatoes, peppers, squash, lettuce, trees, and shrubs, so it can support a mixed garden plan with one product. The supplied directions say spring and fall are best for trees and shrubs, offering a seasonal schedule for those uses. Handling requires protective equipment, and the product should be kept in a cool, dry place.

Skip it if you want liquid fertilizer for houseplants and hydroponics; MARPHYL All-Purpose Plant Food is listed for both.

Gardeners seeking an organic granular food for flowers, vegetables, trees, and shrubs may value its slow breakdown and seasonal directions. Consider the protective-equipment guidance and whether a granular soil application fits your routine.

Listed on Amazon as: Espoma Organic Plant-Tone 5-3-3 Natural & Organic All Purpose Plant Food; 4 lb. Bag; The Original Organic Fertilizer for All Flowers, Vegetables, Trees, and Shrubs.

#7

7. Jobe's Organics Granular

• Weight: 16 lb
• Form: Granules

Best for: Organic Garden Bed Feeding.

Why it ranks #7: Its 4-4-4 organic granules cover vegetables, flowers, trees, and shrubs and are OMRI listed for organic gardening; application is every two to three weeks.

OMRI-listed organic granules with a 4-4-4 NPK formula make this a clear choice for gardeners prioritizing organic feeding across vegetables, flowers, shrubs, and trees. The product is stated to avoid wasteful runoff, mess, hazards, and smells, while its application schedule calls for feeding every two to three weeks or as needed.

Its 4-4-4 formula supplies nitrogen, phosphate, and potash, with calcium, magnesium, and sulfur also listed among the ingredients. The granules are OMRI listed for organic gardening and may be used in certified organic food production according to the supplied description. Application every two to three weeks or as needed means a more frequent routine than long-duration feeds. The listed plant range spans vegetables, flowers, trees, and shrubs, making this a broad garden option for buyers comfortable with recurring applications.

Skip it if you want a single application to feed for up to six months; Osmocote Smart-Release Plant Food Plus Outdoor and Indoor offers that interval.

Organic gardeners feeding vegetables, flowers, shrubs, and trees may appreciate the OMRI listing and broad use. Its two-to-three-week application schedule is the key fit consideration for anyone preferring less frequent feeding.

Listed on Amazon as: Jobe’s Organics Granular All Purpose Fertilizer, Easy Plant Care Fertilizer for Vegetables, Flowers, Shrubs, Trees, and Plants, 16 lbs Bag

#8

8. TPS All Purpose NPK

• Form: Liquid

Best for: Liquid Feed For Mixed Plants.

Why it ranks #8: The liquid formula is described for flowers, vegetables, shrubs, and houseplants, but the supplied specifications do not give an NPK ratio.

A fast-absorbing liquid formula is the defining feature of this all-purpose NPK plant food, enabling a direct feeding option for growers tending flowers, vegetables, shrubs, and houseplants. Its balanced nutrition is described as supporting overall plant health, healthy foliage, strong roots, and consistent growth across plant stages.

The product combines a balanced all-purpose NPK formula with a liquid form described as fast-absorbing, linking broad nutrition to a feeding method intended for efficient uptake. Its listed plant range includes flowers, vegetables, shrubs, and houseplants, which can help a grower use one feed across a mixed collection. The supplied details do not specify a dilution rate or application interval, so buyers who rely on precise scheduled directions should check the product’s instructions before establishing a routine.

Skip it if you need a listed up-to-six-month feeding interval; Osmocote Smart-Release Plant Food Plus Outdoor and Indoor provides that duration.

This liquid option fits growers seeking broad NPK feeding for a mix of houseplants and garden plants, with stated support for roots and foliage. Its supplied details leave dilution and timing unspecified, a relevant consideration for routine planning.

Listed on Amazon as: All Purpose NPK Fertilizer – Complete Liquid Plant Food for Balanced Nutrition, Vigorous Growth & Strong Root Development, 8 oz

#9

9. Miracle-Gro Indoor Food

• Form: Liquid

Best for: Indoor Container Plant Care.

Why it ranks #9: This liquid food covers indoor containers including houseplants, flowers, vegetables, and herbs, but its listed scope is limited to indoor use.

Instant-feeding liquid nutrients are the key distinction here, giving indoor plant owners a way to feed houseplants, flowers, vegetables, and herbs in containers. The two-pack supplies the same all-plant indoor formula for routine care, with the stated benefit of healthier, stronger plants versus unfed plants when used as directed.

Because this is a liquid food that feeds instantly, it suits indoor growers who want nutrients delivered during their regular plant-care routine rather than a listed slow-release schedule. Its stated use covers all indoor container plants, including houseplants, flowers, vegetables, and herbs, so one formula can serve a mixed indoor collection. The 8-fluid-ounce bottles come as a two-pack. The product contains N, P, and K; light needs and annual repotting remain separate parts of plant care.

Skip it if you need one fertilizer for outdoor beds too; Miracle-Gro Water Soluble All Purpose Plant Food covers indoor and outdoor plants.

Indoor gardeners with a varied collection of potted plants will appreciate the broad stated use and instant-feeding liquid format. Keep its indoor-container scope in mind if your routine also includes outdoor beds or in-ground planting.

Listed on Amazon as: Miracle-Gro Indoor Plant Food for All Plants, 8 fl. oz. (2-Pack)

#10

10. TPS Indoor Plant Food

• Weight: 8 oz
• Form: Liquid

Best for: Houseplant Foliage And Roots.

Why it ranks #10: Its liquid formula is designed for indoor houseplants such as monstera, pothos, and snake plants, making it narrower than the all-setting options.

A houseplant-focused liquid formula that supports foliage, new growth, and roots is the practical draw here, giving indoor growers one feed for familiar plants such as pothos, monstera, philodendron, and peace lilies. The directions call for mixing one tablespoon with 32 ounces of water, so it fits a measured watering routine.

Its indoor focus makes it a targeted choice for collections that include tropical plants, snake plants, fiddle leaf figs, and other listed houseplants. The stated benefits connect feeding with fuller leaves, steady new growth, and stronger roots; those roots are described as helping plants absorb more water and nutrients. Since the directions specify one tablespoon per 32 ounces of water, owners can prepare a measured batch for routine watering. This is a houseplant product, not a stated all-outdoor garden formula.

Skip it if you need fertilizer for outdoor beds as well as indoor pots; Miracle-Gro Water Soluble All Purpose Plant Food is listed for both.

Indoor plant owners seeking foliage and root support can use this liquid in a measured watering routine across several listed houseplant types. Its indoor emphasis is the boundary to weigh if outdoor vegetables or garden beds also need feeding.

Listed on Amazon as: Indoor Plant Food, Complete Liquid Fertilizer for Houseplants, 8oz