Triple 13 13 13 Fertilizer of 2026

The Gardenwise 13-13-13 Slow Release Granular Fertilizer is a well-rounded plant food designed for outdoor use. It delivers equal parts nitrogen, phosphorus, and potassium to support everything from lawns and vegetable gardens to roses, shrubs, and trees. This balanced formula makes it a solid choice for gardeners who want a single product that can handle multiple planting areas without the hassle of mixing different blends.

What really stands out is the slow-release technology. One application feeds plants for up to eight weeks, which means less time spent reapplying and more consistent nutrition for your greenery. The fine granules spread easily and sink into the soil for efficient absorption. In practice, this translates to deeper roots, greener foliage, and more vibrant flowers or produce. Whether you're tending a St. Augustine lawn or a raised bed of tomatoes, this fertilizer delivers reliable results.

Build quality is straightforward. The granules are uniform and dry, which makes them easy to measure and apply with a spreader or by hand. The packaging is sturdy and resealable, keeping the product fresh between uses. Gardenwise offers several sizes, from a 1-pound quart to a 40-pound bag, so you can pick the right amount for your project without waste.

No product is perfect, and a couple of things are worth noting. Because this is a slow-release formula, you won't see instant greening. It's designed for steady feeding over weeks, not a quick fix. Also, while the granules are easy to apply, you need to be careful not to over-apply in containers or small beds. Follow the recommended rates and you'll be fine, but it's something to keep in mind if you're new to granular fertilizers.

Overall, the Gardenwise 13-13-13 is a dependable, all-purpose fertilizer that simplifies feeding for a wide range of outdoor plants. Its balanced nutrients, long-lasting release, and easy application make it a smart buy for both beginners and experienced gardeners. If you want healthy, thriving plants with less effort, this product delivers.

Gardenwise 13-13-13 Slow Release Granular Fertilizer is a versatile all-purpose plant food designed for outdoor use. It delivers a balanced blend of nitrogen, phosphorus, and potassium (13% each) to support healthy growth across lawns, vegetable gardens, roses, flowers, shrubs, trees, and even potted plants. Whether you're nurturing St. Augustine grass or tending tomato plants, this fertilizer provides the essential nutrients needed for strong roots, lush foliage, and vibrant blooms.

The standout feature is its slow-release technology. One application feeds plants for up to 8 weeks, which means less time spent reapplying and more consistent nutrition. The granules are fine and easy to spread by hand or with a broadcast spreader, ensuring even coverage. After watering in, the nutrients gradually break down, giving plants a steady supply without the risk of burning. This makes it a reliable choice for both new and experienced gardeners who want a set-it-and-forget-it solution.

In real-world use, the fertilizer performs as advertised. Lawns show deeper greening within a couple of weeks, and flowering plants produce more buds. The phosphorus component is especially helpful for root development, which is critical for transplants and young shrubs. Potassium boosts overall plant resilience against stress and disease. While results aren't instant, the long-lasting feeding cycle reduces the total number of applications needed over a season.

One potential drawback is that the slow-release nature means you won't see immediate results like with a liquid fertilizer. Also, the granules need to be watered in thoroughly to activate, so dry spells can delay nutrient release. The larger sizes (like 20 quarts) are heavy, which might be a concern for those with limited storage or mobility. However, the product is available in smaller bags to suit different needs.

Overall, Gardenwise 13-13-13 is a solid, no-fuss fertilizer that delivers balanced nutrition over an extended period. It's especially good for gardeners who want to simplify their feeding routine without sacrificing plant health. If you value convenience and consistent results, this is a worthwhile addition to your gardening toolkit.

Pendelton Turf Supply's Triple 10 All Purpose Liquid Fertilizer is a balanced 10-10-10 formula enhanced with amino acids and seaweed extract. It's designed for gardeners who want a single, versatile solution for everything from vegetable patches to houseplants and lawns. The 32-ounce concentrate dilutes to make up to 32 gallons, making it a cost-effective choice for medium to large plantings.

What sets this fertilizer apart is the inclusion of 5.5% amino acids and seaweed extract. Amino acids help plants absorb nutrients more efficiently and cope with stress, while seaweed extract encourages strong root growth and overall vigor. The easy-measure bottle is a thoughtful design detail: just squeeze to fill the integrated measuring chamber, then pour into your watering can. No separate measuring cups or messy spoons needed.

The recommended rate is 1-2 ounces per gallon of water, applied every one to two weeks. Starting at the lower end is wise for sensitive plants. Users report visible results within a week or two, noting greener leaves and more blooms. Because it's a liquid, it's quickly absorbed by both soil and foliage. It's safe for use around edible plants, though you should follow the instructions carefully.

The bottle is sturdy and the label clear, though the fertilizer itself is brown and can stain if spilled on light surfaces. As with any concentrate, store it out of reach of children and pets. The product has a high rating but currently few reviews, so long-term feedback is limited. Some users may prefer a granular option for large lawns, but this liquid is excellent for spot treatments and container plants.

If you're looking for a straightforward, all-purpose liquid fertilizer that goes beyond basic NPK, the Triple 10 with amino acids and seaweed is a solid pick. It's especially good for gardeners who value convenience and want one bottle that covers many bases. The price is reasonable given the concentrate makes many gallons. It's a practical addition to any plant care routine.

The Knox Fertilizer 20lb 16-16-16 is a straightforward, no-nonsense all-purpose fertilizer designed for homeowners and gardeners who want reliable results without complexity. With a balanced nitrogen-phosphorus-potassium ratio, it's suitable for lawns, flower beds, vegetable gardens, and container plants alike. This product is particularly appealing to those who need a fast-acting boost for their plants during the growing season.

The standout feature here is the 16-16-16 formulation, which provides equal parts of the three primary nutrients. This balance helps prevent overemphasis on leaf growth at the expense of roots or flowers. The fertilizer is fast acting, meaning nutrients become available to plants soon after application. In practical terms, you can expect a visible green-up in your lawn within a few days, and garden plants often respond with more vigorous growth. It works well as a general maintenance feed or as a quick correction for nutrient deficiencies.

In terms of design, the product is straightforward: a 20-pound bag of granular fertilizer. The granules are uniform and easy to spread using a broadcast or drop spreader, and the bag includes clear application instructions. The dimensions of the bag (3 x 13 x 22 inches) make it manageable for storage, though the weight may be a consideration for some. There are no special formulations like slow-release coatings or organic certifications, but that keeps the price accessible and the product simple to use.

A potential drawback is that because it's fast acting and synthetic, it requires careful application to avoid burning plants. Overapplication can lead to excessive leaf growth and potential environmental runoff. It's also not suitable for those committed to organic gardening methods. Additionally, because it's not slow-release, you'll need to reapply every four to six weeks during the active growing season to maintain results.

Overall, the Knox Fertilizer 20lb 16-16-16 is a solid choice for gardeners looking for an effective, all-purpose fertilizer that works fast and covers a lot of ground. It's best for general feeding of established plants and lawns where quick results are desired. If you prioritize balanced nutrition and ease of use over organic or slow-release features, this product delivers on its promises. For the price, it offers good value and dependable performance.

The Pendelton Turf Supply 13-13-13 Garden Grower Fertilizer is a balanced, all-purpose plant food designed for vegetable and flower gardens. It comes in a 6 lb bag and packs an equal ratio of nitrogen, phosphate, and potash, plus pelletized lime and a suite of micronutrients. This combination makes it a solid choice for gardeners who want a readily available source of nutrition that covers the basics while also addressing calcium needs and trace mineral deficiencies.

What sets this fertilizer apart is its thoughtful formulation. The 13-13-13 NPK ratio is a classic balanced blend that promotes leafy growth, strong root development, and flowering without overemphasizing any single nutrient. The addition of pelletized lime not only supplies calcium but also helps buffer soil pH when used as directed. Micronutrients like iron, zinc, and manganese round out the package, giving plants a more complete diet. This matters for crops like tomatoes and peppers, which are prone to blossom end rot when calcium is scarce or uptake is poor.

In real-world use, the fertilizer works best when applied according to the detailed instructions. For tomatoes and peppers, a side-dress after blossom with half a pound per 25 feet of row gives good results. For vine crops, scattering a tablespoon or two around each hill every four to six weeks keeps growth steady. The granular texture is easy to handle, and the pellets dissolve reasonably quickly when watered in. You won't need complicated equipment, just a measuring cup and a garden trowel.

There are a few drawbacks to consider. This is a synthetic fertilizer, not organic, so if you're committed to certified organic methods, you'll want to look elsewhere. Also, the need to measure and apply at specific times means it's not a low-maintenance option. Finally, the lime component will raise soil pH over time, which is fine for most vegetables but could be a problem for acid-loving plants like blueberries or azaleas unless you adjust your overall soil management plan.

Overall, the Pendelton Turf Supply 13-13-13 Garden Grower Fertilizer delivers reliable, balanced nutrition for a wide range of garden plants. It's particularly well suited for home gardeners who grow a mix of vegetables and flowers and appreciate having clear application guidelines for different crop types. If you're comfortable with a standard synthetic fertilizer and want something that covers the basics plus calcium and micronutrients, this product is a solid pick.

The Aprceo SoilMoist NitroGreen 100% Organic Fertilizer is a nitrogen-rich plant food designed to boost leafy growth in vegetables and herbs. It's a straightforward option for organic gardeners who want to give their greens a healthy kick without relying on synthetic chemicals. With a 13-0-0 analysis, this product delivers a concentrated dose of nitrogen to support lush foliage and strong stems.

The standout feature here is the high nitrogen content paired with organic certification. This makes it particularly effective for fast-growing leafy crops like lettuce, spinach, kale, and herbs such as basil and cilantro. When applied as a top dressing or mixed into the soil, the granules release nutrients slowly, reducing the risk of burning plants. For those focused on leaf production rather than flowers or fruit, this fertilizer hits the mark.

In terms of design, the 14 oz container is compact and easy to handle. The granules are fine enough to spread evenly, though the small size means you'll need multiple purchases for larger garden beds. Application instructions are simple: sprinkle around the base of plants and water in. It's a no-fuss product that fits into any organic routine.

However, there are some limitations. The lack of phosphorus and potassium means this isn't a complete fertilizer. If you grow tomatoes, peppers, or other fruiting vegetables, you'll need to supplement with a balanced formula. Also, at around $25 for 14 oz, the price per ounce is higher than synthetic alternatives - but that's expected for organic products. The slow-release nature can be a drawback if you need quick results.

Overall, the SoilMoist NitroGreen is a solid choice for targeted nitrogen feeding. It's best suited for gardeners who already have a base fertilizer and need an extra boost for leafy growth. If your focus is on lush greens and you prefer organic methods, this product delivers on its promise without any gimmicks.

Irrigation-Mart Super Rainbow 13-13-13 is a balanced granular fertilizer packed in a 50-pound bag. It's designed for homeowners and gardeners who want one reliable product that works across lawns, flower beds, and vegetable gardens. The 13-13-13 ratio provides equal parts nitrogen, phosphorus, and potassium, making it a go-to choice for general feeding.

The standout feature here is the homogenous granule process. Each pellet contains exactly the same blend of nutrients and micronutrients, so you don't get hot spots or uneven growth. Combined with the Ammoniated Advantage, which reduces nitrogen loss through volatilization, this fertilizer delivers more of its nutrients directly to your plants. That means less waste and more consistent results.

In practice, the granules flow smoothly through most spreaders and the 50-pound bag gives you plenty of coverage for a typical suburban lawn or a decent-sized garden plot. The inclusion of micronutrients like iron, zinc, and manganese helps keep foliage green and plants resilient. Because the nutrients are released gradually, you get steady growth without the sudden surges that can stress plants or cause excessive thatch.

On the downside, there are no customer reviews yet to confirm how it performs across different soil types or climates. Also, the bag is hefty at 50 pounds, so it's not ideal if you have limited mobility or storage space. And while the balanced ratio is versatile, it might not be the best choice if your soil test calls for a specific nutrient adjustment.

Overall, this is a solid, well-formulated fertilizer for anyone who values consistency and efficiency. The homogenous granules and enhanced nitrogen technology set it apart from basic blends, and the price reflects that quality. If you're looking for a dependable all-purpose feed that covers a lot of ground, the Irrigation-Mart Super Rainbow 13-13-13 is worth a try.

Size: 50 pounds
Weight: 50 Pounds
Product Group: Lawn & Patio
NPK Ratio: 13-13-13
Form: Homogenous Granule
Features: Ammoniated Advantage, Micronutrients

The Carl Pool Control Release Plant Food is a granular fertilizer with a balanced 13-13-13 N-P-K ratio. It is designed for gardeners who want a dependable, all-purpose feeding solution without the hassle of frequent reapplications. The controlled release technology ensures that nutrients are gradually available to plants over several weeks, which is especially useful for busy homeowners or those new to gardening.

One of the standout features is its versatility. Whether you are growing tomatoes, maintaining a flower bed, or feeding your lawn, this fertilizer can handle the job. The slow-release mechanism helps prevent nutrient burn, a common issue with stronger, quick-release products. In use, the granules are easy to scatter by hand or with a spreader, and they break down naturally with moisture.

Build quality is straightforward — the granules are uniform in size and not overly dusty. The 4-pound bag is convenient for small to medium gardens, though larger properties might need multiple bags. Packaging is basic, and the label provides the essential NPK information but lacks deep application guidance. You may need to do a little research to determine the exact rates for your specific plants.

A notable drawback is the absence of customer reviews, which makes it harder to gauge real-world effectiveness. Additionally, this is not an organic formulation, so if you prioritize natural gardening, you will want to look elsewhere. Some users might also prefer a more detailed ingredient list to check for micronutrients.

Overall, the Carl Pool Control Release Plant Food offers a reliable, balanced nutrient profile at a fair price. It is best suited for gardeners who value convenience and want a slow-release granular option that works across many plant types. While it lacks flashy features, it gets the job done without the guesswork of mixing liquid feeds.

The Scotts Turf Builder Triple Action Built For Seeding is a smart choice for anyone starting a new lawn from seed or overseeding. It combines a pre-emergent weed preventer, a starter fertilizer, and a growth booster in one bag. This product is specifically formulated to work with grass seedlings, so you don't have to worry about stunting new growth while stopping weeds. It's designed for cool-season grasses like Kentucky Bluegrass, Tall Fescue, and Perennial Ryegrass, and should not be used on Bermuda or other warm-season types.

Customer reviews highlight real-world performance: many users see visible sprouting within a week and dense, weed-free growth in a month. The active ingredient mesotrione prevents weeds for up to six weeks while feeding the lawn. Customers also appreciate the convenience of a single application instead of separate products. However, a few caution that over-application on existing grass can cause temporary whitening. Following the spreader settings exactly is key.

Build quality is typical for Scotts – a sturdy bag with clear instructions. The fine granules allow even distribution, and the 4.3 lb size covers 1,000 sq ft. One downside is that it won't kill existing weeds, so you may need a post-emergent product later. Also, it requires consistent watering after application to activate the weed barrier and keep seeds moist.

Overall, for DIY homeowners establishing a new lawn from seed, this product delivers on its promises. It simplifies the process and yields impressive results when used correctly. Just be sure to choose the right grass type and apply at the recommended rate.