Best 20 20 20 Fertilizer For Indoor Plants

#1 · Best Overall

1. Jack's Classic 20-20-20

• Weight: 1.5 lb
• Form: Powder

Best for: Flexible feeding for houseplants.

Why it ranks #1: Its exact 20-20-20 analysis is recommended for indoor plants, and the water-soluble powder supports root, foliar, and continuous-feed applications.

Root and foliar feeding in one water-soluble powder gives Jack’s Classic an adaptable routine for indoor plants. Mix the measured concentrate with water, then apply it to roots or leaves, or use it in a continuous-feed system. Its balanced 20-20-20 formula is presented for fast green-up and leaf expansion.

The dual root-and-leaf application lets you choose a soil watering or direct foliage treatment without switching products. A continuous-feed option also suits growers who already use that setup. Because the fertilizer comes as a water-soluble powder, you measure and mix it with water when preparing a feeding rather than handling a ready-to-pour liquid. The 1.5-pound tub supplies a general-purpose formula for indoor and outdoor plants, so it can serve more than one planting area.

Skip it if you want a ready-to-pour liquid; EZ-gro’s 20-20-20 fertilizer is sold in liquid form.

Choose this if you want one balanced formula for indoor plants and value root, foliar, or continuous feeding options. It is a powder, so plan to measure and mix each batch with water.

Listed on Amazon as: Jack's Classic 20-20-20 All Purpose Water-Soluble Fertilizer, 1.5lb

#2 · Best Liquid Formula

2. EZ-gro 20-20-20 Liquid

• Weight: 2 lb
• Form: Liquid

Best for: Liquid with micronutrient coverage.

Why it ranks #2: This liquid has the requested balanced 20-20-20 ratio and lists magnesium, boron, copper, iron, manganese, molybdenum, and zinc.

A complete listed micronutrient package sets this EZ-gro liquid apart from a basic balanced feed. Its 20-20-20 formula pairs equal nitrogen, phosphate, and potash with magnesium, boron, copper, iron, manganese, molybdenum, and zinc, giving indoor growers one all-purpose product for multiple growth needs.

The liquid form comes in a 32-ounce bottle, making it a direct option for growers who prefer liquid plant food to a powder that must be dissolved. Its balanced NPK is described for leaf growth, root development, and flowering, while the listed micronutrients broaden the formula beyond the three primary nutrients. Iron is supplied as DTPA chelate, a specifically identified form. The product is presented for anything you grow, rather than a narrow plant category.

Skip it if you need a stated dilution rate on the supplied listing; ferti-lome 11728 includes soil and foliage mixing directions.

This suits indoor growers seeking a liquid, balanced feed with a broad listed micronutrient package. The supplied product details do not state a dilution rate, so it is a less informative choice if you need one here.

Listed on Amazon as: EZ-gro 20-20-20 Liquid Fertilizer – Indoor Plant Fertilizer, 32 oz / 1 Qt

#3 · Best Houseplant Powder

3. Grow More All-Season's Plant Food

• Weight: 1.5 lb
• Form: Powder

Best for: Year-round houseplant nutrition.

Why it ranks #3: This 20-20-20 water-soluble powder is explicitly described for houseplants and includes chelated micronutrients for year-round plant feeding.

Chelated micronutrients are paired with an all-season 20-20-20 formula in Grow More’s houseplant food. The listing frames it for year-round vitality and multiple growth stages, including leaf development, root vigor, and flowering, making it relevant to growers feeding plants through changing stages.

The powder form lets you prepare the plant food as needed, while the balanced 20-20-20 ratio covers primary nutrients in equal proportions. Grow More also specifies absorbable, chelated micronutrients, which adds a defined feature beyond the NPK analysis. The product is presented for houseplants and a wide variety of greens, with nutrition aimed at leaf, root, and flowering development. Its all-season positioning may suit a collection where plants are not all at the same growth stage.

Skip it if you need a listed dilution rate before feeding; ferti-lome 11728 gives soil-drench and foliar mixing directions.

Consider this for houseplant collections needing an all-season balanced powder with chelated micronutrients. The supplied details do not provide a mixing rate, so it is not the clearest choice when you need one stated here.

Listed on Amazon as: Grow More All-Season's Plant Food (20-20-20 Fertilizer) – 1.5lbs of All Purpose Fertilizer – Water Soluble Plant Food for Houseplants with Chelated Micronutrients

#4 · Best With Kelp

4. GS Plant Foods 20-20-20

• Weight: 3 lb
• Form: dry

Best for: Micronutrients and kelp inclusion.

Why it ranks #4: It pairs the requested 20-20-20 ratio with listed micronutrients and kelp, and the 3-pound dry package is the largest listed here.

Kelp, identified as Ascophyllum nodosum, distinguishes GS Plant Foods’ balanced 20-20-20 powder. The formula also lists six micronutrients and use across indoor and outdoor plants, gardens, and turf, offering growers a broad-use concentrate with more specified ingredients than its NPK ratio alone.

The 20% nitrogen, 20% available phosphate, and 20% soluble potash analysis gives the product its balanced profile, while iron, manganese, copper, zinc, boron, and molybdenum make the micronutrient blend explicit. Kelp is another named component in the formula. In dry form, the three-pound product is a concentrate to prepare for feeding rather than a ready-to-use liquid. Its stated range from houseplants to turf suits growers managing more than indoor pots.

Skip it if you want a ready-to-pour liquid; EZ-gro’s 20-20-20 fertilizer is listed in liquid form.

This fits growers who want a balanced powder with named micronutrients and kelp for indoor plants plus broader garden or turf use. Choose another format if you do not want to prepare a dry concentrate.

Listed on Amazon as: GS Plant Foods All Purpose Water Soluble 20-20-20 Fertilizer Balanced NPK Plant Food with Micronutrients, Contains Kelp (Ascophyllum nodosum) for Indoor & Outdoor Plants, Gardens & Turf (3 lbs)

#5 · Best Chelated Minors

5. Southern Ag PowerPak 20-20-20

• Weight: 16 oz
• Form: Soluble Fertilizer

Best for: Houseplants with chelated minors.

Why it ranks #5: The water-soluble 20-20-20 formula includes chelated minor elements and is specifically listed for houseplants as well as outdoor plants.

Chelated minor elements accompany Southern Ag PowerPak’s balanced 20-20-20 formula, giving houseplant growers more than the three primary nutrients. The water-soluble fertilizer is also listed for flowers, roses, vegetables, shrubs, trees, and lawns, making it relevant if your feeding routine spans several plant types.

The supplied directions call for two teaspoons in a gallon of water, a concrete starting point for preparing a batch to water plants. Because this is a soluble fertilizer, mixing it with water turns the concentrate into a feeding solution. Its use list includes houseplants alongside outdoor plant categories, so one product can cover mixed plant collections. The listed chelated minor elements add a micronutrient component to the nitrogen, phosphorus, and potassium analysis.

Skip it if you want named micronutrients before choosing; GS Plant Foods 20-20-20 lists iron, manganese, copper, zinc, boron, and molybdenum.

Choose it if you want a water-soluble balanced feed for houseplants and other plant types, with a listed gallon mixing rate. The individual minor elements are not named in the supplied details.

Listed on Amazon as: Southern Ag PowerPak 20-20-20 Water Soluble Fertilizer with micronutrients (1 LB)

#6

6. Ferti-lome All Purpose 20-20-20

• Weight: 8 oz
• Form: Liquid

Best for: Flowering and foliar routines.

Why it ranks #6: Its 20-20-20 plant food is described for potted plants indoors and can be used as a soil drench or foliar spray.

Specific soil-drench and foliage-feed mixing rates make ferti-lome 11728 useful for growers who want defined application options. Its 20-20-20 plant food is presented for potted plants and flowering varieties, with the listing highlighting flower size, quantity, color vibrance, and continued flower production.

For a soil drench, the directions give a rate of 1–2 teaspoons per gallon of water; for foliage feeding, they give 1/4–1 teaspoon per gallon. Those separate rates help you prepare for root or leaf application instead of guessing at a single method. The product is listed for indoor and outdoor use, including geraniums, pansies, petunias, and hanging baskets. Directions also specify frequent application, every watering or every 3–4 days.

Skip it if you prefer feeding less often than every watering or 3–4 days; Jack’s Classic lists continuous-feed use as an option.

Consider it for indoor potted plants and flowering varieties when you want separate drench and spray directions. Its frequent application schedule is an important fit consideration before choosing it for your routine.

Listed on Amazon as: Fertilome (11728) All Purpose Water Soluble Plant Food 20-20-20, 8 oz

#7

7. Gardenwise 20-20-20

• Weight: 2 lb
• Form: Granules, Powder

Best for: Indoor-to-garden powder concentrate.

Why it ranks #7: This water-soluble 20-20-20 powder is listed for indoor plants and dissolves in water, though its product details emphasize broad indoor and outdoor use.

One water-soluble 20-20-20 powder is listed for houseplants as well as orchids, vegetables, flowers, and lawns. Gardenwise says it dissolves in water for quick nutrient absorption, giving growers a single general-purpose formula that can move between indoor plants and outdoor growing areas.

The balanced nitrogen, phosphorus, and potassium formula is associated with foliage, roots, and blooms, so it covers several growth aims in one product. Its powder or granule form is mixed with water before use; the listing describes it as dissolving instantly, which supports preparing liquid feed from the concentrate. The broad use list includes indoor plants and orchids alongside vegetables, flowers, and lawns. The two-pound quantity may suit growers maintaining both houseplants and a wider garden.

Skip it if you need a stated dilution rate before preparing feed; ferti-lome 11728 lists separate soil and foliar rates.

This is a fit for growers who want one water-soluble formula spanning houseplants and outdoor plantings. Check that the product’s directions available to you provide the dilution guidance your feeding routine requires.

Listed on Amazon as: Gardenwise 20-20-20 Water-Soluble Fertilizer – Powder for Liquid Plant Food for Indoor & Outdoor Plants, Orchids, Vegetables, Lawns, Flowers – 20 20 20 Fertilizer 1 Quart (2 lbs~ 1 qt.)

#8

8. Peter's Professional 20-20-20

• Weight: 2 lb
• Form: Powder

Best for: Micronutrient general-purpose powder.

Why it ranks #8: It is a general-purpose 20-20-20 water-soluble powder with micronutrients, but the supplied details do not specifically identify indoor plants.

Peter’s Professional lists a general-purpose 20-20-20 powder with micronutrients, giving indoor growers a balanced formula in a two-pound quantity. Its supplied details identify it as water-soluble, though they provide little application guidance, so the main appeal is the formula and general-purpose positioning.

The 20-20-20 analysis and micronutrient inclusion make this a broadly positioned plant food rather than one tied to a particular indoor species. Powder form means it is a concentrate, and the water-soluble description indicates preparation with water for feeding. The two-pound quantity gives growers a substantial supply, but the listing does not provide a mixing rate or specify which micronutrients are included. It also says the pouch is not resealable and recommends transferring opened product to an airtight container.

Skip it if you need named micronutrients and a listed feeding rate; Southern Ag PowerPak specifies a gallon mixing rate.

This can suit growers who want a two-pound general-purpose 20-20-20 powder with micronutrients. Plan on separate airtight storage after opening, and note that the supplied details do not name a mixing rate.

Listed on Amazon as: Peter's 20-20-20. 2 Pounds. General Purpose Water Soluble Fertilizer with Micro Nutrients.

#9

9. Gardenera 20-20-20 Powder

• Weight: 16 oz
• Form: Powder

Best for: General-purpose foliar powder.

Why it ranks #9: The water-soluble 20-20-20 powder is described for houseplants, but the supplied product details provide little application or nutrient information.

A water-soluble foliar formulation gives Gardenera’s 20-20-20 powder a clear application focus for houseplants, flowers, and vegetable crops. Its listing also presents it as an all-purpose fertilizer for indoor and outdoor plants, suiting growers seeking one product across several plant categories.

The powder format means you prepare a liquid feed from the concentrate, while the product description specifically identifies foliar feeding. That combination can suit growers who want to apply plant food to foliage rather than rely only on soil watering. Its stated range includes houseplants, flowers, and vegetable crops, with indoor and outdoor use also noted. The supplied facts do not give a dilution rate, so the product’s broad use claims do not provide a complete mixing workflow.

Skip it if you need mixing directions in the supplied listing; ferti-lome 11728 specifies rates for soil and foliage application.

This suits growers seeking a water-soluble foliar product for houseplants and several crop types. Its listed application focus is useful, but the supplied details lack a rate for preparing the feed.

Listed on Amazon as: BESTSELLER 20-20-20 Water-Soluble Fertilizer – Powder for Liquid Plant Food for Indoor & Outdoor Plants, Orchids, Vegetables, Lawns, Flowers – 20 20 20 Fertilizer – 1 Quart

#10

10. Miracle-Gro Water Soluble Plant Food

• Weight: 1.5 lb
• Form: Powder

Best for: Quick-mixing general plant food.

Why it ranks #10: It feeds indoor plants, but its listed 24-8-16 NPK ratio does not match the requested 20-20-20 formula.

Instant-starting water-soluble powder is the defining feature of this Miracle-Gro plant food, which the listing says feeds indoor and outdoor plants. Note that its analysis is 24-8-16, not 20-20-20, so it is an alternative for shoppers open to a different nutrient ratio.

The powder dissolves in water and is described as reaching roots and starting to work instantly, making it a quick-feed option rather than a 20-20-20 match. Its listed use spans houseplants, roses, flowers, vegetables, trees, and other indoor or outdoor plants. The product information says it will not burn plants when used as directed, and leftover powder can be closed and stored in a dry place away from children and pets. Its 24-8-16 analysis is the key formula distinction.

Skip it if you require an exact 20-20-20 ratio; Jack’s Classic 20-20-20 offers the target analysis in water-soluble powder.

This suits growers who prioritize a water-soluble, broad-use plant food and accept a 24-8-16 analysis. Skip it when matching a 20-20-20 ratio is essential to your selection.

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