As we plan expansion of our vegetable garden/tiny farm, we’re hoping to grow healthy food by continuing to use organic methods and some principles of biointensive (biologically intensive) planting. The idea of biointensive farming is far from new, but more small and large farmers are applying biointensive principles, which complement organic methods – and for us – water savings.
In biointensive horticulture, rich, healthy soil maximizes a farmer’s yield in minimal space; it also strives to continuously preserve, or even improve, the soil’s health. And that should be the goal of any vegetable gardener. Biointensive farmers loosen soil more deeply by using tools such as broadforks instead of tilling and turning the soil over. Compost is king, building and enriching the soil.
So far, so good. We already take those steps. A few more principles of biointensive gardening follow. I want to share our measured approach largely to help gardeners who have less time or experience. Any method with the word “intensive” in the name is going to freak some folks out. But nothing says that gardeners have to follow every tenet of biointensive gardening to the letter. To me, adopting any of the ideas should improve plant health and production, especially if you’ve never gardened organically. There’s no way I can adequately tackle this topic; entire books address it. And I don’t claim to be an expert, but we’re adding to our knowledge base with research, along with trial and error!
Healthy soil for healthy plants
As I said, composting and double digging of beds better prepares soil. If you can produce your own compost on site, even better. That leaves plenty of healthy organic matter on hand and saves money. Another principle is avoiding chemicals in the garden. If soil and plants are healthy, they should need less help and better resist pests and diseases. We spray aphids off with blasts of water, handpick critters like cucumber beetles and use insecticidal soap or diatomaceous earth only when nothing else works.
More yield in less space
Maximizing growing space is another premise of biointensive gardening. One reason is weed prevention and cooling of soil, or “living mulch” from mature plants. The other is efficiency and production, especially for urban gardeners with limited space. We certainly want to grow as much as we can in the space we have. But in biointensive gardening, the design and proximity of plantings is a little too, well, intense for me.
I love the idea of planting lettuces and other low greens close enough to help shade the soil and block weeds. But I’ve seen what happens when people plant tomatoes too close together. Not only do some plants shade others from valuable sun, but they don’t get enough air circulation. Plants also compete for nutrients and water. And why build an above-ground highway to make it even easier for a hornworm to travel from one plant to another? Finally, I want to be able to reach plants for easy maintenance and harvesting. We’ll experiment on the lettuce and maybe another crop or bed to see how close spacing compares.
Interplanting and companion planting
We’ve read Jean-Martin Fortier’s “The Market Gardener,” and plan to employ many of his methods for building rows. We’ve built up the soil and added compost, and measured the rows so they’re 30 inches wide, with a small walkway between each. That’s just enough room to maximize growing area and minimize plant problems or gardener aches, pains and frustration. We’ve got containers to extend our growing space. I believe we’ll also try a little more interplanting, just to help maximize space or use the shade from a tall or trellised plant to cool another. Many urban gardeners use square-foot gardening to achieve intensive planting.
We won’t, however, use interplanting as companion planting. I know there is historical basis for placing particular plants next to one another to improve each plant’s health or yield, but I’m less certain about scientific basis for the practice. Aside from use of cover crops to enrich the soil at the end of the season, I’m not sold on companion planting. Of course, I might have a jaded opinion because I’m so tired of seeing it, along with many garden myths, pushed on Pinterest. We’ll continue to build and improve the soil in our beds and rotate crops.
Whole-minded and open pollination
The biointensive principle of using open-pollinated seeds instead of GMO varieties ensures biodiversity of crops. The reason is that heirloom varieties that are not cross-pollinated by nearby plants can be saved for use the next year. Saved hybrid seeds are not reliable. Our focus this year has been on organic seeds, and I don’t believe we would try to save seeds for vegetables regardless. We have saved or redistributed seeds from wildflowers.
As with permaculture, biointensive gardening focuses on the whole and how different parts of the garden, or ways of gardening, affect each other. For example, if I don’t apply chemicals to my vegetables, but use pesticides on ornamentals on my property, I still affect the tiny ecosystem. The pesticides can kill bees that might otherwise fly over to the vegetable garden and pollinate a cucumber.
Learn more about biointensive gardening from Fortier’s book and from this Mother Earth News article, including a great explanation of square foot gardening. And don’t stress over doing everything suggested or doing it perfectly. The first goal is to grow healthy plants and food for your family.