Caring for your crops and treating issues that arise.
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Treating Common Plant Diseases

Get ahead of challenges in the garden by learning about preventive techniques for these common plant diseases that can affect your crops.

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Powdery Mildew

Produced by a number of fungi, spores are carried by wind from plant to plant, settling on their leaves where small grey patches will appear. Most often affecting cucumber, squash, calendula, hollyhocks, and zinnias, powdery mildew can affect other plants, too.

Prevention and Treatment

Your best bet for mitigating the disease before it spreads is to keep plant leaves on the drier side and maintain good air circulation. To prevent the spores from overwintering in the garden, make sure to compost or bury infected plants.

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Roots become thick, swollen, and distorted. Affected plants exhibit wilting during the day and will spring back at night. All brassicas are prone to this fungal disease. 

Prevention and Treatment

Prevention is everything since there is no treatment for infected soil as the fungus can lay dormant for up to 8 years. Crop rotation and keeping soil well-drained will help prevent clubroot. Avoid composting affected plants and opt instead to dispose of them in the trash.

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Tomato Late Blight

This fungus is carried by the wind where spores will land on tomato plants. Spores need to fall directly on the fruit for the plant to become infected, which will eventually show through browning of leaves and fruit. It will then only grow on plants that are wet for over 48 hours at a time.

Prevention and Treatment

Dampness from the rain, heavy dew, and condensation creates an environment for the fungus to thrive. The disease is common on the west coast of Canada and in the interior of BC. Use mulch around plants and trim bottom leaves to minimize initial infection or select a determinate plant variety, which can be grown in planters under your residence's eaves.

Read More on Late Blight

Fall & Winter Harvest

It's time to plant overwintering varieties. See our recommendations below.

Image of Ailsa Craig

Ailsa Craig

Huge and sweet, named after a stony Scottish island.

Image of Kalibos


Superb taste with spectacular purple leaves.

Image of Patterson Coated

Patterson Coated

Round, smooth bulbs, these store very well.

Image of Tiara Coated

Tiara Coated

Try making sauerkraut with this tender variety.

Image of Deadon Coated Organic

Deadon Coated Organic

This award-winner's colour intensifies in cold weather.

Image of Borettana


This Italian heirloom can be stored for up to 5 months.

Image of Lennox Coated Organic

Lennox Coated Organic

An industry standard for winter cabbage.

Image of Eleonora Organic

Eleonora Organic

Stays sturdy on windy or exposed gardens.

Image of Integro Coated Organic

Integro Coated Organic

A uniform, thick-leaf superior cabbage.

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Protect Your Crops

We offer useful solutions to keep harmful insects away from your plants.

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Companion Planting Guide

Free resources? That's right! Request a copy of our popular guide today.

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