Container Gardening Tips0
The more I learn about sustainable living, the more convinced I become that everyone can grow fresh food at home. Not everyone can have the same 1,500 square feet of garden space that we have here at Arcadia Farms, but even renters and apartment dwellers can grow a significant amount of food in a container garden. Container gardening is also a great place for reluctant homeowners to start. If you’re convinced that growing some of your own food would be beneficial but are hesitant to rent a rototiller and start digging up your backyard, consider starting with a container garden. Today I want to share some tips with you on how to make your container garden a successful one.
For the most part, growing veggies in containers is the same as growing them directly in the ground or a raised bed. One obvious difference is that you have less soil to work with. With less soil, you’ll need to pay close attention to your plants nutritional needs (small space means soil nutrients can be used up more readily). You’ll also need to keep a close eye on moisture (it’s easy to over or underwater a container garden). Let’s talk about those two factors – and a few other things you should keep in mind.
1. Give Your Plants Nutrients
To make sure your plants get the nutrients they need, I recommend starting with good quality compost. Because the soil in your container is more likely to become compacted over time, mixing in some vermiculite would also be preferable. There are also many ready-mixed organic garden soils that provide a good supply of nutrients while still being lightweight.
After your plants are established (are showing their true leaves), you’ll want to give them with a natural fertilizer. Good choices are fish emulsion (diluted in water per the bottle’s directions) or an organic soil amendment (such as Jobes organic tomato and vegetable fertilizer.) Fertilize every 1 to 2 weeks after your plants begin to show their true leaves. Here’s another idea for fertilizing your container: A whole, in-shell, raw egg. Warning: I’ve never actually tried this myself, rather, I found the idea on Pinterest. The idea is that the egg will decompose slowly and add nutrients to the soil as it does.
If you intend to use the same containers over and over again, there are a couple of things to keep in mind when it comes to soil fertility. First, you should add new organic matter every year. Fall is a good time to do this so that the materials have time to breakdown over the winter. You can accomplish this by adding grass clippings, shredded leaves, table scraps, store-bought or homemade compost. The second thing to keep in mind has to do with crop rotation. Just like an in-ground garden, plants of the same family ‘eat’ certain nutrients in the soil. If you continue to plant the same type of plant in the same container, over time the nutrients necessary for the healthy growth of that plant will be depleted. To avoid this issue, rotate similarly sized containers through various crops of different plant families. If your season and container are conducive to this, consider sowing some manner of nitrogen-fixing crop after your summer veggies are spent. This cover crop will keep weeds from inhabiting your container over the cooler months and will also add nitrogen to the soil. For a list of nitrogen-fixing cover crops, click here. In general, any legume will do the trick, such as peas and beans.
You can also add nutrients to your container by adding a layer of woody debris – such as broken branches, twigs or even small logs – to the bottom of your container. As the wood breaks down it adds nutrients to the soil, among other benefits.
2. Manage Moisture
Another benefit of adding woody debris to your container is that it helps to retain moisture. As wood breaks down it acts like a sponge, attracting water and then releasing it slowly into the surrounding soil as needed. This is the primary function of wood in hugelkultur – a system where raised bed gardens are built over piles of well-rotted (spongy) wood to help retain moisture and reduce (or eliminate) the need for irrigation. You can put this hugelkultur benefit to work for you on a container-sized scale. I even read that one blogger found better success with logs placed vertically than horizontally, essentially because the grain of the log acted like a straw for moisture to move up and down. (As soon as I can re-find his post I will link to it here!). Keep the following tips in mind when selecting wood for your container:
- Avoid wood so large that will interfere with the growth of root crops (i.e. carrots)
- Avoid treated lumber
- Avoid wood from plants that contain natural herbicides, such as black walnut
- The more rotten the wood, the better
- Fresh wood that contains a significant amount of tannin (i.e. pine) should be avoided until the wood is older (6 months old at earliest, just my opinion)
Don’t feel like you need to use a giant log in your 12” pot – just a handful of fallen sticks from the yard will help! These sticks will also help provide some air pockets for drainage at the bottom of the container which is of critical importance in container planting. (You don’t want to drown the roots of your plant – they need air too!)
Because containers can dry out easily, try mulching the top to keep the soil cool and water from evaporating. If your container is large enough, you may consider using an olla to reduce the amount of time you spend on watering.
And lastly, because moisture management is so important in container gardening, you’ll want to invest in a moisture meter. For $5-$10 you can find something like this (image at left) which takes the guesswork out of whether or not to water – just stick the probes into the soil and you’ll find out how much moisture is already present.
3. Choose the Right Container (Size, Shape & Materials)
When it comes to container gardening, bigger is generally better. That’s because you have more moisture-retaining, nutrient-rich soil to work with. But that doesn’t mean a small container can’t be just as successful! In Mel Brook’s Square Foot Gardening method, nearly everything can be grown in soil that is just 6” deep. (Root crops will need a minimum of 12”.) The necessary width of your container will depend on what you’re growing – tomato plants do best with at least 2 square feet of space while one head of lettuce requires only 12.5% of a single square foot. Use these plant spacing rules as a guideline for container planting.
Tall or vining crops (such as cucumbers and tomatoes) will need a trellis. Does your container have enough space to hold both your plant and your trellis? Or will you use an external trellis near the container such as a fence or a porch railing? Here are some ideas for container-gardening trellises. Click on the image for more info and image sources.
Also consider the material makeup of your container. You’ll want to avoid containers from treated materials, ones that may leach chemicals into your soil or that previously held harmful chemicals/materials.
4. Location, Location, Location
This isn’t real estate, but location is still pretty darn important! The closer your containers are to the house, the less likely you’ll be to neglect them. Plus if you have easy access to your cherry tomatoes and snap beans, you (and your family) will be more likely to grab a few for a snack or dinner than if you have to wander far from the back door.
When choosing a location for your container garden, sunlight is another huge consideration. In general, you’re looking for a location with as much sun as possible. However some plants benefit from a little shade. To determine the best location for each crop, check out the info on the back of the seed packet. Once you’ve identified your shade-loving plants and your sun-loving plants, you can devise a plan for each group. You may even be able to use your large sun-loving plants to provide shade to your shade-loving plants. Shade-lovers staged on the east side of sun-lovers will get plenty of morning sun but will be shielded from harsher afternoon rays.
And when you place your containers, keep pests in mind! Do you have deer nearby? You may want to keep your containers in a fenced area. Is the sunniest spot in the yard also in the path of your pets and kids – you’ll need a plan to keep them from being toppled over. Another way to keep bunnies and other critters away from your veggies is to interplant smelly things to deter them – chives, garlic, marigolds and rosemary are good options.
As you ponder how to incorporate these tips into your own container garden, take a peep at some of these neato ideas for inspiration.
I’m working right now on a custom container gardening plan for growing lots of things like tomatoes, cucumbers, peppers, carrots, potatoes and herbs. I hope to share that with you soon!