Category Archives: Pest Management

Vertical potatoes, pest management and interplanting galore

Another great garden workbee yesterday, with a huge turnout for the beautiful weather! We definitely took advantage of the increased manpower available, installing a chicken wire trellis for our peas, fixing the irrigation system, and doing a huge amount of weeding and prepping of beds. We’ve now got corn in the ground, waiting to be joined by the other two sisters of beans and squash in a few weeks. Eggplants were put in by the green beans to ward off Colorado Potato Beetle, and a wide variety of heirloom and non-heirloom tomato varieties were interplanted with basil and parsley to improve growth. We also put in a few cucumber plants, and Phyllis was sure to plant a few radish seeds around the base of each to ward off the cucumber beetle. Pennyroyal was also liberally planted around the bed for its purported insect and squirrel repelling properties. If it works, I’ll be going out to buy tons more!

We faced our first bug infestation this week, flea beetles were spotted chewing small circular holes through our

Flea Beetle Damage

 oriental greens, and making incursions into the neighbouring spinach. I’ve done a little research, and besides preventing them by timing your planting for when they’re least likely to be out, and keeping your plants healthy and well watered so they aren’t vulnerable to attack, there are a few natural control techniques that seem to work. The first is to use yellow sticky traps. Like many pests, flea beetles are attracted to the colour yellow, so these sticky traps can be used to attract them away from the plant, and then trap them. Since these traps can catch beneficial insects as well, it’s best to just hold them under the plant and brush the leaves so the flea beetles jump off, rather than leaving them in the garden to trap indiscriminately. I tried making an emergency trap yesterday using a piece of card and a gluestick, to no avail, so I’ll try something stickier and report back. If this doesn’t work, we’ll try making a homemade pest spray next week in the garden, and also planting some nasturtiums around the garden, as our seeds never did come up. If the flea beetles are attracted to yellow, nasturtiums should do the trick!

Another exciting development of this week was the construction of our vertical potato garden. This is a fascinating space saving technique for growing potatoes, which has the added benefit of keeping them away from pests that may be lurking in the garden soil. Here’s how it works:

Often a garbage can with air and drainage holes is used for this type of planting, but we decided to use an old black plastic composter for our potato planter, as it has great ventilation, is stackable, which allows it to grow as the potato plants grow, and we just had it lying around and are always keen to reuse what we can. The concept behind the vertical potato farm is simple. Fill the bottom of your potato container with 6 inches of compost, then spread your chitted potatoes (potatoes with eyes beginning to sprout) on top. Chitting potatoes first isn’t absolutely necessary, but helps them to grow faster and takes little extra effort. Cover these potatoes with 3 more inches of compost, water and then wait! Once the seedlings poke through about an inch, cover them with another 3 inches of compost. Continue this process until the plants reach the top of your container, and then allow them to grow and flower. They should grow potatoes all the way up the height of your container.

Our vertical potato planter

 A great feature of this technique is the ease of harvesting- just dump the container or, in our case, take apart the composter, and there you’ll find all the potatoes you’ve grown, no more lost potatoes in the field! We planted 5 different varieties, 2 new potatoes, one blue variety, yukon golds, and a brazilian red skinned potato I don’t have much hope for as they were really behind the curve in the chitting process. New volunteer this week Lil suggested we cover the planter with chicken wire to keep marauding squirrels and parkgoers from digging up our new potato plants, so we wired on some easily removable protection overtop. We’ll keep you up to date on this technique throughout the season with pictures. Anyone with vertical potato growing experience please let us know your suggestions.

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Filed under Container Gardening, Garden Update, Pest Management

Cleaning house

Thursday’s workbee was an extremely productive one, and we managed to get some hard work in before the weather turned and stayed sour for the rest of the weekend. I and five amazing volunteers muscled up to the task of wheeling mulch across the park, rebuilding our trellises and emptying out two years old black composters, filled with some surprisingly good compost, once we got through all the duck eggshells on top. We’ve got the garden looking ready for the coming season, and for the new planting we will be doing at this weeks workbee. As our radishes, beets, and greens have all sprouted nicely, this week will be time to put in another row of each. No sign from our carrots yet, we planted a row of purple, red and orange mixed varietites, but the day after planting I found a giant footprint in the middle of the row, so I’m not too optimistic! 

We also planted some border crops last week, nasturtiums, lavender, rosemary and marigolds, and discussed how they and our chive and onion border can help to keep out bugs. A lot of this is discussed in the Natural Garden Care flyer of a previous post, here’s some brief benefits of these crops: 

Chives

Chives repel japanese beetle, aphids and carrot rust fly. Chive spray, made by chopping chives and soaking them in boiling water until cool, can be used as a spray to prevent downy and powdery mildew on squashes and cucumbers. 

     

Lavender

 

 Lavender’s scent and flowers attract a wide range of beneficial insects and repels fleas and moths.

Marigold

Marigolds repel cabbage maggot, Colorado potato beetle, cucumber beetle, Mexican bean beetle, nematodes, rabbits tomato hornworm and whitefly. Must use scented varieties to repel pests.

Nasturtium

Nasturtiums repel asparagus beetle, cabbage looper, Colorado potato beetle, cucumber beetle, imported cabbageworm, squash bug, striped pumpkin beetle. Also attracts hoverflies which prey on aphids. Nasturtium are especially useful as a trap crop for aphids- they will be more drawn to nasturtium plants (especially yellow flowering ones) than crops such as tomatoes and cucumbers that you are trying to grow. An additional bonus is that their flowers and edible and add a nice peppery taste to salads.  

Rosemary

Rosemary repels bean beetle, cabbage moth, carrot fly, mexican bean beetle, moths, snails, and slugs. Should not be planted near potatoes or cucumbers, as it impedes their growth, or basil, which harms rosemary plants.

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Filed under Companion Planting, Garden Update, Pest Management

Free gardening info sheets

In honour of Earth Day, we at Toronto Green Community have developed a wide range of info sheets on ecological gardening techniques. Available below in pdf form are one page info sheets  on composting, container gardening, natural pest control, planting, preparing soil, selecting plants and starting your garden. And they’re all Free!

Please enjoy the information and feel free to respond with feedback or requests for more info sheets.

 Composting infosheet

container gardening info sheet

natural plant care

Planting

Preparing Soil

Selecting Plants

Starting your garden

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Filed under Composting, Container Gardening, Pest Management, Soil Health, Weeds