Home Buying Guides 10 of the best all-purpose organic fertilizer

10 of the best all-purpose organic fertilizer

by Jackson White

As a gardener, we wish our garden soil would provide all the nutrients and trace elements your plants need to grow and flourish. But the reality is your garden and lawn soil needs a little boost to make this happen. Natural and the best all-purpose fertilizers can help to improve the health of your soil by providing macro and micronutrients that encourage lush and healthy growth all year round.

Plants require complex nutrients that might at times be found in the soil, but it’s rare to find the perfect combination in the soil in your garden or lawn. Most of the time the soil you’re working with will be missing some important things that your plants need to flourish. One way of ensuring they get all they need is by adding some fertilizer, preferably organic.

Table for the best all-purpose fertilizer

Fertilizer
When to apply
Check on Amazon
Every 7-14 days
After every 4 months
After every 6 months
During the growing season
After every 3 months
Every stage of the plant’s life cycle
Every 2-3 weeks
Beginning of the growing season
During the growing season and late season
Once every month during the growing season

Miracle-Gro water-soluble all-purpose plant food

Miracle-Gro is a trusted and well-known brand among gardeners and this all-purpose plant food is one of the most popular fertilizers in the market. It’s an affordable and versatile fertilizer that you can use on your houseplants, veggies, trees, roses, shrubs, and more. It’s safe to use on all the plants and it doesn’t burn when you follow the instructions. This is a powerful fertilizer that you only need to dissolve in water and spray directly on all the plants you think need some extra nutrients every one to two weeks. For best result make sure you soak the base of the plants so the plants can absorb the fertilizer readily. It will instantly start to work on your plants resulting in bigger, healthier plants. You can apply it at any time of the day but the best time is every 7-14 days when the plants are actively growing, and it has an NPK ratio of 24-8-16.

 

Pros

  • Very affordable
  • It can last all season
  • Works very well on all plants
  • Very easy to use

Cons

  • Might not work for some plants

 

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Jack’s classic all-purpose water-soluble plant food

This is a top-rated mineral fertilizer you can use on your indoor and outdoor plants including perennials, foliage plants, roses, evergreens, bulbs, and others which makes it a great all-purpose plant food to have around your house. This fertilizer has an equal NPK ratio on all the nutrients of 20-20-20. It releases its nutrients gradually for up to 4 months and this helps to support vigorous plant growth by feeding them through their leaves and roots. It’s made from the finest raw materials and it dissolves faster and cakes less than other brands which makes it more effective in promoting fast root and shoot growth. If used correctly, it won’t burn your plants and to help you use the precise measurements as per the instructions, a measuring spoon is included in the bag.

 

Pros

  • Works very well on all plants
  • Doesn’t burn your plants
  • Keeps the leaves green and healthy
  • Very easy to use

Cons

  • It’s a bit pricey

 

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Osmocote smart release plant food

This fertilizer is excellent for both indoor and outdoor plants and it features a smart release filtration system that’s designed to control the release of nutrients which means it will continue to feed your plants over 6 months. It contains 11 essential nutrients that your plants need to grow healthy and strong. The best thing about this fertilizer is that it can be used with any type of plant it doesn’t matter if it’s potted or not and in any growing condition. This plant food has granules that are coated with semi-permeable resin that allows water to penetrate to dissolve the nutrients that are then released when there’s a change in the temperatures, especially during the warmer active growing months. Once the nutrients are released, the empty shell remains. Its formula ensures that it doesn’t burn your plants.

 

Pros

  • Does well on both existing and new plants
  • Continues to provide nutrients for a long time
  • Gives you beautiful results in no time
  • Doesn’t burn your plants

Cons

  • The plastic shell isn’t biodegradable

 

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Dr. Earth premium gold all-purpose fertilizer

This is 100% natural and organic fertilizer made with quality ingredients that are safe for humans, pets, and plants. It’s enriched with nutrients, minerals, and more, but doesn’t include any synthetic chemicals in its formula. It’s a natural and organic hand-crafted blend that will provide balanced and fast nutrition to your annuals and perennials, veggies, shrubs, flowers, potted plants, trees, and more. This is a great fertilizer that will provide all the nutrients your plants need to flourish and grow throughout the year regardless of the season.

 

Pros

  • Greens up your plants fast
  • Works very well on flowers
  • It contains natural and organic ingredients

Cons

  • Has a strong bad smell

 

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Jobe’s organic all-purpose fertilizer

If you’re looking for a fertilizer that will work on all your plants, choose one with an all-purpose formula. Most all-purpose fertilizers tend to have the same percentages of nitrogen, phosphate, and potassium. This all-purpose granular plant food has equal amounts of NPK of 4-4-4. The granules contain a powerful biozome, a unique and proprietary blend of beneficial microorganisms that add beneficial microbes to improve your soil quality in the long term that help to naturally reestablish a balance between your plants and the soil. You can mix it with your soil at different stages of your plant’s growth to help break down the dirt into plant nutrients so that your plants have more food to grow healthy and strong. This fertilizer has a slow-release formula that will help feed your plants for up to 3 months. It comes with a conveniently resealable container to help keep it fresh and prevent contamination or getting wet.

 

Pros

  • Provides your plants with all the nutrients they need
  • Works well on all types of plants
  • Improves your garden or lawn soil
  • Keeps your plants green and healthy

Cons

  • It’s expensive for large gardens
  • Your pets might dig the plants after applying the fertilizer

 

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Fox farm liquid nutrient trio soil formula

This is a 3-pack liquid fertilizer that is for each stage of your plant’s life. The first grow big fertilizer can be used to support abundant shoot and foliage growth, and once your plants start to bud or flower, use the second tiger bloom bottle that is an ultra-potent fertilizer high in phosphorous to help all your flowering plants produce large, healthy buds and blossoms. The third bottle, Big bloom has a higher nitrogen content and can be used throughout the growing period to provide nutrients to your plant’s root system so they can continue to grow strong and survive. This fertilizer is perfect for late-season veggies and flowers. This is the perfect kit of fertilizers your plants need throughout their growing and maturity stages.

 

Pros

  • A 3-in-1 solution for different stages of your plant’s growth
  • Very easy to use
  • Great for both indoor and outdoor plants
  • Gives you excellent results in a few weeks

Cons

  • Can burn your plants
  • Have a slight odor

 

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Neptune’s Harvest organic fish and seaweed fertilizer

This is the perfect organic fertilizer you need to grow everything including veggies, lawns, trees, shrubs, flowers, fruits, indoor and outdoor plants, and even potted plants. It contains both fish emulsion and seaweed that helps to build the natural sugars in your plant’s leaves which helps them to grow stronger even when there’s extreme heat of it’s dry. Foliage, flowers, and fruit become stronger and more productive with their fruits having a longer shelf life. This fertilizer has an NPK ratio of 2-3-1 that works by strengthening foliage giving the blooms more color, increasing their quality, and making them more fragrant. You can use it on your houseplants and lawn to help germinate the seeds faster, even your rose bushes. You can easily mix and spray on your plants every 2-3 weeks to get the best results, but don’t water your plants after application.

 

Pros

  • Helps to grow happy, healthy plants
  • Great organic fertilizer for flowers
  • Provides nutrients for plants even when it’s extremely dry
  • Helps to revive a dead lawn

Cons

  • Has a very strong smell
  • Dogs and cats love the smell
  • May not work for all plants

 

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Epsoma organic plant-tone all-purpose plant food

This is an all-natural fertilizer that has a biotome formula for promoting bigger growth and blooms. This is a perfect plant food that you can use on a variety of applications including your veggies, flowers, trees, and shrubs to ensure superior plant growth. This all-purpose plant food is formulated with a mix of bone meal, poultry manure, alfalfa meal, and feather meal, also enhanced with beneficial microbes that will help to improve the health of your plants. This organic fertilizer has a higher nitrogen content than other nutrients with an NPK ratio of 5-3-3 and its slow release formula means your plants will get continuous nutrition throughout their active growing season. You can easily mix this fertilizer with the soil and because of its natural ingredients, it will attract flies and other pests.

 

Pros

  • Your plants have a better color
  • Helps to grow strong roots and stems
  • Easy to mix with the soil
  • It’s mild and won’t burn your plants when applied directly

Cons

  • Has a very strong smell
  • Attracts dogs

 

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Worm castings organic fertilizer

This is a great all-around fertilizer and a soil conditioner that will provide both quick and long-term nutrients to your plants without changing your soil’s pH levels. When applied in the soil, it will attract more worms to your garden which helps to continually improve the health of your soil. The earthworms process the soil where the resulting castings are re-deposited into the soil as broken down nutrients that can be easily absorbed by your plants. The nutrients are in 2 forms, the first form is quickly and directly absorbed by your plants to help boost their growth when the plants are just shooting out leaves or during the late season. The other form provides a long-term solution by creating a rich environment for your plants to grow and since your plants only need small amounts to grow this fertilizer becomes a great investment. The worm castings increase airflow in the soil improving its overall soil structure and with steady continuous use, your plants will grow fibrous and dense roots over time. The worm’s gut contains microbes that provide your plants with other needed micronutrients to further improve the soil conditions and support plant growth.

Pros

  • Provides quick and long term nutrients for your plants
  • Boosts the soil’s nutrients
  • It’s odor-free
  • The worm castings are rich in nitrogen

Cons

  • It has a shelf life
  • Might not be effective on all plants

 

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Down to earth organic all-purpose fertilizer

This is an all-purpose all-natural fertilizer that works with the microorganisms, organic matter, and fungus in your soil to feed your plants and boost their growth. It contains a nice blend of organic nutrients in ideal proportions without using synthetics and other low-quality fillers to ensure that your veggies, flowers, trees, herbs, shrubs, potted plants, and all types of transplants get natural nutrients for their growth. This organic fertilizer delivers a steady supply of organic nutrients that will help to stimulate microbial activity and improve your soil’s fertility to produce healthy plants naturally. This is a gentle, non-burning fertilizer that contains natural ingredients like rock phosphate, fishbone meal, feather meal, alfalfa meal, blood meal, kelp meal, langbeinite, and humates.

Pros

  • Great multi-purpose fertilizer
  • Helps your plants to thrive
  • Packaged in a very sturdy bag
  • Helps to improve your soil’s nutrient content

Cons

  • It has a strong smell
  • Attracts flies

 

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How to choose the best all-purpose organic fertilizer

Deciding on the best organic fertilizer for your plants can be a bit challenging since different veggies and plants need different amounts of nutrients at different stages of their growth cycle.

Common fertilizer formulas

All fertilizers have a combination of nitrogen N, phosphorous P, and potassium K with a formula represented as NPK.

Nitrogen

Mostly nitrogen has the highest percentage in a fertilizer formula because it’s the most important of the three and plants absorb a lot of nitrogen that is either provided naturally or through a fertilizer. Nitrogen helps your plants to grow big and strong and also encourages the production of protein that becomes plant tissue which contains the plant’s building blocks.

Phosphorous

This is important for photosynthesis. It helps your plants to produce, store, and use energy that helps them to grow and develop. As nitrogen provides your plants with building blocks, phosphorous helps your plants to grow big and strong throughout their life cycle.

Potassium

Also known as potash, helps your plants to create disease resistance and increase crop yields. So a fertilizer with high amounts of potassium will result in more fruit or veggie growth or more blooms. Your plants will also be of higher quality with bigger fruits and more luscious blooms. Potassium can also help strengthen your plant’s root system to protect it from harsh weather.

Organic fertilizer types

Dry organic

These contain living organisms and their bi-products or they can be a blend of many ingredients. Almost all organic fertilizers have a wide variety of nutrients, but a blended mix is specially formulated to provide a balanced amount of nitrogen, phosphorous, and potassium, and micronutrients. They tend to break down slowly when releasing nitrogen and help to improve the texture and density of the soil. The downside to these fertilizers is they have a strong foul smell.

Liquid organic

Plants absorb these fertilizers through their leaf pores and roots. The leaves can also provide the plant with nutrients (foliar feeding) that isn’t available or is lacking in the soil or when the roots are stressed. This is very effective for fast-growing plants like veggies that need an extra boost during their growing season. You can use liquid fertilizers to give your plants a light boost of nutrients every month or 2 weeks during their growing season, especially for flowering and fruiting plants.

Growth enhancers

These are materials that help your plants to better absorb nutrients from the soil. The most common being kelp a type of seaweed that is either sold as a dry meal or an extract in liquid or powder form. It’s safe to use and it contains 60 trace elements that your plants will need in small quantities, growth hormones, and enzymes.

Conclusion

When choosing organic fertilizer or any type of fertilizer, it should be based on the type of soil you have, the nutrients it’s missing, and can either be in dry or liquid form.

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