Do You Take Sand to the Beach?
- Judith Paul
- Apr 6
- 10 min read
No? Then why buy soil for your garden?
Every year, I am astounded at the number of American gardeners who purchase soil to put in their gardens. Initially, I thought there were geological problems in the area in which I lived that created gaping holes every winter, or perhaps an astounding number of raised gardens being established. Turns out, they were putting the soil in their gardens, and they’d been doing it for years to ‘improve’ the soil. Er … what?
There is plenty of sand at the beach, so why take more? What should be added to a garden if not soil? Compost is the life of the party for your soil, turning bland dirt into a nutrient-rich wonderland where plants thrive, and roots do the cha-cha. Soil is not compost and adds very little to soil except structure. It’s great for filling a hole, leveling lawns, and filling a raised bed, but it’s not the lifeblood of a garden. Compost is.
Why Compost Matters
Many new gardeners believe that tossing in a little fertilizer or a few shovelfuls of “premium” soil is enough to make their gardens flourish. That’s like expecting to win a dance contest by standing in the corner and nodding your head to the beat. Here’s the real secret: compost does what fertilizer and plain soil can’t—it totally transforms the ground beneath your feet (and your tomatoes).
Soil Structure: Compost fluffs up the soil, breaking up heavy clay and giving sandy dirt something to hold on to. Fertilizer just feeds: compost builds a foundation.
Microbial Magic: Compost introduces an entire metropolis of beneficial microbes and fungi. Fertilizer? It’s a three-note solo act that does absolutely nothing to improve the soil, and can do more harm than good if it is not needed or an unsuitable N-P-K.
Water Retention: Compost acts like a sponge, helping your plants hold onto water during dry spells, so you don’t have to perform the “garden sprinkler dash” at 6 AM in your PJ’s.
Planting Magic: In addition to being used as an all-over ‘toner’, compost is also ideal for new plants when they are introduced to their forever home in a garden bed. It provides just the right blend of water retention, nutrients, and friability for a new plant to root in and flourish.
Some soil products say they include fertilizer and/or have some compost mixed in, but it’s still primarily soil. The bottom line: adding fertilizer is like giving your plants an energy drink. Adding soil to your garden is like taking sand to the beach. Adding compost is like signing your gardens up for a wellness retreat, puppy yoga included.
Root Anatomy: Feeder Roots and the Fragility Factor
Let’s talk root anatomy. Many believe roots are indestructible explorers, tunneling through anything in their path. In reality, your plant’s feeder roots—the thin, delicate tips—are more like a group of introverted artists: talented, but easily overwhelmed by crowded, dense environments.
These fragile feeder roots are only found at the ends of root systems, and they’re the ones doing all the heavy lifting when it comes to absorbing water and nutrients. Asking them to push through compacted soil is like expecting a gummy bear to drill through concrete.
On the other hand, roots grown in water have no barriers and can go wherever unimpeded. Imagine growing an oak tree hydroponically. In theory, it is possible to grow an enormous tree in water laced with nutrients, but because the roots are not in soil, it does not have any stability.
Without something for the roots to grab onto and embed themselves in, a hydroponically grown mighty oak is just a floating dream, one gentle breeze away from disaster.
Soil is critical, not just for something for plant roots to latch onto (and into), it is also the carrier mechanism for the lifeblood of a garden, but if your garden needs a transfusion, bags of soil aren’t going to achieve that.
Soil: More Than Just a Supporting Actor
Soil often gets typecast as “that brown stuff” and referred to as dirt, which is something you wipe off a wall. Soil provides structure and bulk, not necessarily nutrients. Soil plays the same role as the set design in a Broadway musical—it holds everything together and gives your plants a stage, but it’s the compost that supplies the costume changes, music, and generates the standing ovations.
Think of nutrients in your soil as passengers on a bustling subway system, traveling through tunnels carried by water, ferried by microbial activity, and even hitching rides with earthworms. Water acts as the train, dissolving soluble nutrients and moving them through pore spaces via mass flow and diffusion. Beneficial microbes and fungi act as conductors, breaking down organic matter and releasing nutrients, while earthworms mix and aerate the soil, creating channels that help distribute these nutrients far and wide. This interconnected network ensures your plants get the nourishment they need, wherever their roots reach. Soil is the environment in which this process happens, but the good stuff in it can be leached out over time. The ‘proper’ way to have great soil is to add compost to your gardens. Adding more soil to a garden bed (aka, taking sand to the beach) does not significantly increase nutrient levels or make it more hospitable for microbial activity and plant growth.
Types of Compost: A Lineup Worthy of Any Garden Gala
Manure-Based Compost: Made from animal manures (like cow, horse, or chicken), this compost is nutrient-rich and helps improve soil texture. It brings beneficial microbes and is especially great for heavy feeders like veggies. Bonus: it’s a conversation starter at any garden party.
Leaf Mold Compost: Created by decomposing leaves, this compost is light, fluffy, and exceptional at holding moisture. Ideal for woodland plants and as a mulch for delicate flowers. Every year, nature provides an abundance of leaves, which, with a bit of time and effort, are far better left in your garden than bagged and put at the curb.
Vermicompost: Worms do all the work here. Their castings create a fine, black compost that’s packed with nutrients and gentle enough for seedlings and container plants. The only downside? Your worms might unionize for better working conditions.
Kitchen Scrap Compost: Made from fruit and veggie peels, coffee grounds, and eggshells, this type is easy for home composters. It’s a great way to reduce kitchen waste and pamper your plants at the same time. Fancy compost ‘machines’ and bin systems are great if you want to fuss with them. Me? When I have time, I just dig them straight into the garden.
Green Waste Compost: Composed of grass clippings and garden trimmings, this compost adds nitrogen and breaks down quickly, in fact so quickly it can be spread out in an appropriate location and left to rot down on its own without any sort of digging in. However, don’t use too much fresh grass in one location, or you’ll have a slimy, overheated mess.
Manure-Based Compost: The Cream of the Compost Crop
If compost types were superheroes, manure-based compost would wear the cape. Why? It packs the most nutrients, improves soil structure the fastest, and boosts microbial activity like nothing else. It is how nature designed soil improvement to happen. People concerned about the aroma of well-aged cow manure wafting through the air need not worry, because the bagged products are already composted, and a slight five-minute pong (if that) when it’s first applied doesn’t linger and is not particularly offensive.
Manure-based compost brings the holy trinity of garden goodness: nitrogen, phosphorus, and potassium (N-P-K). It’s also loaded with organic matter that loosens clay soil and bulks up sandy soil. And let’s face it—if animals were willing to, uh, “contribute” to your garden’s success, the least you can do is spread it around.
If you open a bag of compost and notice a white, fuzzy coating or patches of mold, take it as a good sign rather than a problem. The presence of visible fungal growth indicates that your compost is “alive”—teeming with beneficial microorganisms actively decomposing organic matter through a process called microbial succession. Fungi and actinomycetes play a crucial role in breaking down tough plant fibers like cellulose and lignin, releasing essential nutrients into the mix. Unlike packaged food for people, compost should not be judged by the absence of mold; instead, mold means the biological processes are ongoing, and the compost is functioning as intended. Moldy compost isn’t spoiled or “off”—it’s simply garden food, and a compost product should be assessed by its nutrient content and microbial activity, not by the standards we use for groceries.
Compost vs. Soil Conditioner: Similarities and Differences
Both compost and soil conditioner are used to improve the health and structure of garden soil, but they are not exactly the same thing. Compost is the product of decomposed organic matter—such as kitchen scraps, yard waste, or manure—that is rich in nutrients and teeming with beneficial microbes. It feeds plants directly, boosts microbial activity, and supports overall soil fertility.
Soil conditioner, on the other hand, is a retention. While compost can serve as a soil conditioner, not all soil conditioners are compost. Some soil conditioners include products like gypsum, peat moss, or lime, which may not provide as many nutrients but help to loosen heavy soils or adjust pH levels. The main similarity is both aim to make soil better for plants, but compost does so by adding nutrients and life, whereas soil conditioners focus more on physical improvements and sometimes chemical adjustments.
Bonus Tips for Compost Bin Success
Are you going to take sand to the beach this year? Compost is the magic ingredient your garden needs to thrive, with manure-based compost leading the charge. If you are willing to make your own compost—and it only takes a little time and effort to save some money—here are some tips on how to do it.
Layer Like a Lasagna: If you are using a bin system, alternate brown (carbon-rich) and green (nitrogen-rich) materials for best results. Your compost pile should be the envy of Italian grandmothers everywhere.
Don’t Add Meat or Dairy: Unless you want raccoons, skunks, or the neighbor’s dog to host midnight feasts in your yard.
Keep It Moist, Not Soggy: Compost loves moisture, but not pond swimming. Think “wrung-out sponge,” not “mini Everglades.”
Turn It Regularly: Aerate your compost to keep it breaking down and to avoid the dreaded “compost sloth” phase where nothing happens for months. This is where a bin system comes in handy. “Turning” aerates the material being composted, and it is easily accomplished by relocating the top of one bin to the bottom of the next bin. The bin at the end of the production line is the one that’s ready to go onto your garden. If you only have one bin, a rototiller is a good way of aerating the contents, and your back will thank you for the small investment.
Add Compost Enhancers: Although not strictly necessary, it is possible to boost your compost’s power by adding amendments like lime to balance pH, introducing composting worms for faster breakdown, or sprinkling in mycorrhiza products to jump-start beneficial soil fungi. These extras help create an even richer, more microbially active finished product.
Economical Sources: Bagged compost is readily available from a wide variety of sources, including box stores and garden centers. The convenience and ease of handling of bagged compost has many advantages, but if you have access to a pickup, trailer, or are able to purchase a truckload, buying in bulk drops the cost per yard quite significantly. Some areas also have surplus compost created by municipalities that use green waste collected from public spaces, which they then compost. Often more is produced than the organization can use, so the surplus is sold cheaply or given away to residents as a community resource.
Organizations and Initiatives Promoting Composting
Within the USA, there are quite a few organizations and programs that encourage and facilitate community composting and municipal programs.
US Composting Council (USCC): The primary national organization in the US dedicated to the development and promotion of the composting industry, including establishing standards and educating professionals.
Institute for Local Self-Reliance (ILSR): This organization hosts the "Cultivating Community Composting" program and provides resources to help local governments build prosperity through local composting, including a roadmap released in 2026.
USDA/USDA's Composting and Food Waste Reduction (CFWR): A federal initiative providing grants and cooperative agreements to local and municipal governments to develop compost programs, particularly in urban areas.
Let's Go Compost: A national nonprofit focused on practical, hands-on public education and making composting affordable.
Composting Consortium: A partnership that helps municipalities improve their organic recycling systems, managed by Closed Loop Partners.
EPA (Environmental Protection Agency): Provides resources and encourages community composting to reduce landfill waste.
Extension Master Gardeners: A program operating across the US that provides information and training on a wide variety of topics, including composting.
Conclusion: Don’t Be “That” Person—Bring Compost, Not Sand
Don’t invite more sand to your beach party. Compost is the magic ingredient your garden needs to have a good time, with manure-based compost leading the charge. Give your roots room to stretch, your soil structure a boost, and your plants a nutritious buffet. Your garden will thank you for the plant party (and without any risk of sand in your sandwich).
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Hi, I'm Judith Paul, with a gardening style best described as “Oooo, there’s a gap over here!” My work history is equally unpredictable (possibly even quirky) and ranges from pulling eel-infested cow carcasses out of creeks to managing multi-million-dollar projects across various industries. I’m a Kiwi (referring to the iconic flightless bird of NZ, not the fruit) who has also lived in Australia. Currently, I run a licensed and inspected plant propagation nursery in North Carolina (USA) when I’m not teaching, writing, or editing.
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