Best 15-15-15 Organic Fertilizer Options for Gardens and Lawns
No product in this selection is identified in its provided details as organic or certified for organic gardening. Three listings offer a 15-15-15 formula, while two are 15-0-15 lawn fertilizers and do not provide phosphorus. For a balanced granular option, the 1-pound all-purpose fertilizer suits smaller gardens, and CountryMax suits buyers needing a larger supply. The liquid EZ-GRO product is specifically presented for geraniums. Check the label and your gardening standards before treating any of these as organic.
| Product | Listed formula | Best suited for |
|---|---|---|
| All-Purpose Granular Garden Fertilizer | 15-15-15 | Small garden applications |
| CountryMax All Purpose Fertilizer | 15-15-15 | Larger beds and landscape areas |
| EZ-GRO Geranium Fertilizer | 15-15-15 liquid | Geraniums and containers |
| Simple Lawn Solutions 32-Ounce Lawn Fertilizer | 15-0-15 | Grass needing nitrogen and potassium |
| Simple Lawn Solutions 1-Gallon Lawn Fertilizer | 15-0-15 | Buyers seeking a larger concentrate |
All-Purpose 15-15-15 Granular Fertilizer
This 1-pound granular product is the best fit among these options for gardeners seeking a small quantity of balanced 15-15-15 fertilizer. Its listed uses include outdoor vegetable gardens, flowers, fruit trees, shrubs, evergreens, and lawns. The product describes quick-release nitrogen combined with slow-release feeding, but does not specify how long that feeding lasts.
Choose this if you want one fertilizer listing that names several types of outdoor plants. The resealable package may be convenient for storing remaining granules. Its product information describes an even 15% nitrogen, phosphorus, and potassium, supporting foliage, root development, and general plant growth.
Limitation: The details do not identify organic ingredients or organic certification. The 1-pound package may also be a poor match for buyers treating large areas.
CountryMax 50-Pound 15-15-15 Fertilizer
CountryMax is best for buyers who want a larger quantity of balanced granular fertilizer for flower beds, vegetable gardens, raised beds, lawns, or general landscaping. The listing specifies a 50-pound bag and equal parts nitrogen, phosphorus, and potassium. It is positioned for everyday feeding across multiple garden areas.
Compared with the 1-pound option, this product is better suited to larger spaces or regular use where a substantial quantity is useful. The product description says it helps maintain overall soil quality, but does not provide details about organic ingredients, application rates, or release timing.
Limitation: The provided product information does not establish that this fertilizer is organic. Choose it only if its full label meets your gardening requirements.
EZ-GRO 15-15-15 Geranium Fertilizer
This liquid 15-15-15 formula is best for geranium growers, including people feeding container plants. The listing also names other plants that thrive in soil with a pH above 6.2. It gives a mixing direction of 1 ounce per gallon of water and suggests feeding weekly or every 14 days.
Choose this if you prefer a measured liquid application and primarily want to feed geraniums. The directions make it more specific than the general-purpose granular products, while its balanced formula provides all three primary nutrients.
Limitation: The product is described as geranium fertilizer, so it is not the broadest choice for mixed gardens. The provided details do not identify it as organic.
Simple Lawn Solutions 15-0-15, 32 Ounces
This liquid lawn fertilizer is best for grass care when the intended nutrient ratio is 15-0-15 rather than 15-15-15. It contains nitrogen and potassium, plus humic, fish, and seaweed ingredients, according to the listing. Named grass types include Bermuda, St. Augustine, Zoysia, fescue, and Kentucky bluegrass. The listing describes use in spring, summer, and fall.
Choose this if your lawn plan calls for nitrogen and potassium without added phosphorus. The attached sprayer is a distinguishing feature of this 32-ounce version.
Limitation: It is not a 15-15-15 fertilizer because its listed middle number is zero. The presence of fish and seaweed does not by itself establish organic certification.
Simple Lawn Solutions 15-0-15 Concentrate
This 1-gallon concentrate is best for lawn owners who want the same 15-0-15 nutrient ratio in a larger container. Its listing describes nitrogen and potassium for lawn greening, growth, and turf hardiness, with humic, fish, and seaweed. It names the same range of warm- and cool-season grasses as the smaller version.
Compared with the 32-ounce product, this is the larger-container option. Choose it if you specifically need a lawn fertilizer with no listed phosphorus and want a concentrate rather than a balanced 15-15-15 garden fertilizer.
Limitation: This is not a substitute for 15-15-15 where phosphorus is needed. The product details do not state that it is certified organic.
Buying Guide: How to Choose a 15-15-15 Fertilizer
Does 15-15-15 mean organic?
No. The numbers describe the fertilizer’s listed nutrient analysis: nitrogen (N), phosphorus (P), and potassium (K). An equal 15-15-15 ratio does not identify the nutrient sources or prove that a product is organic. Look for explicit organic ingredient information and certification details on the package if organic production is a requirement.
Should you choose granular or liquid fertilizer?
Granular products may suit gardeners who want to apply fertilizer to beds or landscape areas. Liquid products are mixed or applied as directed and can suit container care or lawn applications. Follow the product label for rates, timing, and application method; the provided details do not supply complete directions for every product.
When is 15-0-15 a better fit?
A 15-0-15 product supplies nitrogen and potassium but lists no phosphorus. It may be relevant when selecting lawn nutrition without phosphorus, but it is not a balanced 15-15-15 substitute. Base the choice on plant needs and, where available, soil test guidance.
What package size should you buy?
Match the package to the area you intend to treat and how often you expect to apply fertilizer. The 1-pound garden product is a smaller option, CountryMax is a 50-pound bag, and the lawn products come in 32-ounce and 1-gallon containers. Check storage and application instructions before buying a larger quantity.
Frequently Asked Questions
Can these products be called organic fertilizer?
The supplied product details do not establish that any of the five products is organic or certified for organic use. Verify the full label and certification information before purchasing for an organic garden.
Which listed product is actually 15-15-15?
The all-purpose granular fertilizer, CountryMax fertilizer, and EZ-GRO geranium fertilizer are listed as 15-15-15. Both Simple Lawn Solutions products are 15-0-15.
Which option is intended for geraniums?
EZ-GRO is specifically presented as geranium fertilizer. Its directions say to mix 1 ounce with 1 gallon of water and feed weekly or every 14 days.
Can I use 15-15-15 on every plant?
Not automatically. Plant needs, soil conditions, and label directions vary. Check the fertilizer label and consider soil test results before applying it broadly.