Experienced growers know that a beautiful, sustainable garden starts with living, healthy soil. Most plants thrive in well-drained, slightly acidic, soils that are rich in organic matter. The challenge, however, is that most of the world’s soils do not exist this way and they must be balanced, or amended, to provide the conditions necessary for robust plant growth. Click on the information and news below to learn about soil health and what can be done to improve it.
Before you grow your organic garden, grow your soil. This often-repeated wisdom is simple to say but requires some work to make happen. Growing soil — making it ideal for growing vegetables, flowers, lawns, and other plants — means bringing it to life. How?
- by making sure its acid/alkaline or pH balance is perfect for what you’re growing,
- by providing all the nutrients that your soil may lack and your plants require,
- by improving its structure so that it holds oxygen your plants need as well as retaining necessary moisture and providing critical drainage,
- by supplying and encouraging strong populations of beneficial microbes that will stimulate the health and growth of your plants
Most soil amendments are added to improve the structure of the soil, to increase the organic content so that the soil is more capable of holding nutrients and moisture. When these organic materials are added to the soil, they also act in varying degrees as fertilizers, providing a mix of nutrients to plant roots. By first determining the needs of your soil, you can best determine what you should add. Need nitrogen? Want to sweeten the pH of your soil? Want to increase moisture-holding ability or break up heavy clay soils? (more…)
Healthy soil is the basis of healthy plants and a healthy environment. When garden soil is in good shape there is less need for fertilizers or pesticides. As author and respected gardener Frank Tozer writes, “When building soil you not only improve your plants health, but you can also improve your own.”
Organic soil is rich in humus, the end result of decaying materials such as leaves, grass clippings and compost. It holds moisture, but drains well. Good organic garden soil is loose and fluffy — filled with air that plant roots need — and it has plenty of minerals essential for vigorous plant growth. It is alive with living organisms — from earthworms to fungi and bacteria — that help maintain the quality of the soil. Proper pH is also an essential characteristic of healthy soil. (more…)
Confused about fertilizer numbers? What value do they have in organic gardening? A plant needs nutrients to survive. Most of these are provided by the soil, but soil varies tremendously in nutrient amounts, soil type, pH, and nutrient availability.
The three main nutrients that have been identified as absolutely necessary for plants are nitrogen (N), phosphorus (P) and potassium (K). These three are also known as macronutrients, and are the source of the three numbers commonly found on organic fertilizer labels. The numbers found on our All-Purpose Fertilizer, for example, are 5-5-5. This is the percentage by weight of the N, P, and K found in the fertilizer. (more…)
In a perfect world, your garden’s soil would provide all the nutrients plants need. But in the real world, garden and lawn soil — and thus the plants that live in them — often needs a little boost. Improving the soil is the number one thing you can do to improve your garden, yard or landscape and organic fertilizers can help.
All plants need:
- Macronutrients – nitrogen, phosphorus and potassium
- Secondary nutrients – sulfur, calcium and magnesium
- Micronutrients – iron, manganese, zinc, chlorine, boron, copper and nickel (in very small quantities)
Organic fertilizing can be as easy or as technical as you want it to be. For gardeners who don’t wish to spend a lot of time figuring out what individual plants want, there are commercial blends that can be used on all plants. (more…)
Why not use chemical fertilizers? It’s a reasonable question. After all, nitrogen, phosphorus, and potassium ARE chemicals, so where is the advantage in these bags of heavy, grainy stuff, that need to be measured and mixed and then dug in, when you can just pick up a small plastic bottle of the blue stuff?
There are several organic fertilizer benefits, some purely altruistic, others much more self-interested. First of all, most chemical fertilizers provide only that well-known trio, nitrogen (N), phosphorus (P), and potassium (K). These three, known as the macro-nutrients, are indeed required in greater quantity than any others, but they are only three of the thirteen nutrients plants need. The three chemicals that qualify as secondary nutrients, calcium, sulfur, and magnesium are generally ignored, as are the trace nutrients, boron, chlorine, manganese, iron, zinc, copper, and molybdenum. While these are needed in far smaller quantities than the macro-nutrients, they are still essential. (more…)
Here’s a list of some organic fertilizers you can encounter:
Manure for the garden comes from cow, sheep, poultry and horses. Pretty self-explanatory. Manure is known as a “complete” fertilizer; it has a lot of organic matter, but is low in nutrients. Manures are most valuable as organic soil amendments and mulches. Note: Beware of using fresh manure as a fertilizer because it can burn plants.
Blood meal is dried, powdered blood collected from cattle slaughterhouses. It’s such a rich source of nitrogen that gardeners have to be careful not to over-apply and burn the roots of their plants. Apply blood meal just before planting to stimulate green leafy growth.
Bone meal is finely ground bone. A by-product from animal slaughterhouses, it is a great source of calcium and contains up to 15% phosphate. Bone meal promotes strong root systems and flowering. It is often used when growing flowers, bulbs and fruit trees.
Shellfish fertilizer or shell meal is made from crushed bones or shells from crab or other shellfish. It is a great source of calcium in addition to phosphorus and many trace minerals. One benefit of shellfish fertilizer: it contains chitin which encourages the growth of organisms that inhibit harmful pest nematodes. (more…)
By Bill Kohlhaase, Planet Natural
Here’s something of a Zen puzzle for you. The key to a healthy lawn is healthy, organic soil. And the key to healthy soil is a healthy, organic lawn.
Confused? Don’t be. Organic lawn care starts and ends with healthy soil, soil that is full of nutrients for both grass and the microorganisms that call your dirt their home; soil that is not compromised with toxins and synthetic chemicals that destroy those microorganisms. And nothing contributes to the health of your soil more than a thick, rich organic lawn, one that returns organic nutrients to your soil. In this win-win situation, organic lawn care can actually give you a more vibrant lawn than you would have with regular applications of commercial fertilizer.
To put it another way, the organic lawn is a self-sustaining lawn. (more…)
Nothing can be created out of nothing. – Lucretius, 99 – 55 B.C.
As with any garden, soil preparation is what really counts when it comes to being successful growing in containers. It’s the foundation. It’s the staff of life. Pick your life-giving metaphor and you get the idea.
In other words, select the right potting mix recipe for your plants and they will thrive. Skimp on the soil and you’ll get weak, non-productive plants that require more work to maintain and are susceptible to all kinds of pest problems. (more…)
By Bill Kohlhaase, Planet Natural
Leaves, easily turned into protective mulch, soil-enhancing leaf mold or rich compost, are the fall season’s gift to the composter. After the last tomatoes are picked, the standing greens harvested, the squash brought in and the carrots pulled, nature provides a bounty that assures the next year’s crops will have the best soil possible. Let your non-gardening neighbors curse autumn’s raking tasks. Composters rejoice in the piles of mineral-rich organic material that trees graciously shed just for them.
Okay, okay, maybe that’s a little too much hyperbole. Still, it’s hard not to get poetic about leaves. Sure, raking can be hard work even for composters who know the value in each and every leaf. But leaves have long been a treasure for the gardeners: easily available, rich in nutrients, an effective mulch in winter and summer and, once decomposed, extremely beneficial to the soil. (more…)
One of the great things about gardening — in addition to creating beautiful landscapes and delicious, healthy food — is its educational opportunities. Your friendly Planet Natural blogger has gardened on and off since my childhood some (garbled) years ago and I learn something new almost every time I pick up a how-to book, talk to a companion gardener, or get my hands in the dirt. Best are the things that I once knew nothing about and, as I explore them further, result in deepening levels of understanding and wonder. Current example? Mycorrhiza.
Mycorrhizal fungi are beneficial soil organisms that attach themselves to the roots of plants — almost 95% of the world’s growing things have a symbiotic relationship with mycorrhiza — and help them facilitate the uptake of water and nutrients. I first came aware of the benefits of mycorrhizae when pursuing hydroponic gardening a few years back. Hydroponic gardeners add mycorrhizal fungi products to their growing solutions to encourage quick and vibrant growth. Some soil boosters also contain them. That’s good as far as it goes. (more…)