Community-supported agriculture — commonly abbreviated as CSA — is a subscription arrangement between a farm and a group of households. Members pay for a share of the harvest at the start of the growing season, before crops are planted. In exchange, they receive regular deliveries or pickups of whatever the farm produces throughout the season.

The model emerged in Japan and Switzerland in the 1960s and 1970s and arrived in North America by the 1980s. Canadian farms began adopting it in the early 1990s, and today CSA operations exist in every province, ranging from small backyard-scale market gardens to larger multi-acre operations.

The Basic Structure

At its core, a CSA share represents a pre-purchased portion of a farm's seasonal output. Most farms divide their total anticipated harvest into a set number of shares — often between 30 and 200, depending on farm size — and sell them to members before the season begins.

The season's length varies by region. In Ontario and Quebec, the typical CSA season runs from late May or early June through October. In British Columbia's Lower Mainland, farms with heated greenhouses can extend deliveries to 10 or even 12 months. Prairie provinces generally operate shorter windows from July through September, though the exact timing depends on the year's weather.

A standard vegetable CSA share in Canada typically feeds two to four people when cooking at home regularly. Many farms also offer half-shares for smaller households.

What Goes Into a Box

Box contents change week to week and season to season. Early in the season — May and June in most provinces — members can expect cool-weather crops: spinach, kale, lettuce, radishes, green onions, and early peas. Mid-summer brings tomatoes, cucumbers, zucchini, beans, and herbs. By September and October, boxes shift toward storage crops: winter squash, potatoes, beets, carrots, onions, and garlic.

Most farms do not allow members to choose specific items. The box reflects what is ready for harvest that week. This is a deliberate feature: it encourages cooking with what is available rather than selecting only familiar items, and it ensures nothing goes to waste on the farm side.

Share Types

Farms structure their CSA offerings in several ways. The most common categories include:

  • Vegetable shares — the standard offering, a box of mixed seasonal produce each week or bi-weekly.
  • Half-shares — smaller volume, intended for one or two people. Typically bi-weekly delivery.
  • Add-on shares — supplementary subscriptions for eggs, bread, cheese, or fruit from neighbouring farms or producers in the same region.
  • Herb or salad shares — smaller specialty boxes focused on greens and culinary herbs rather than bulk root vegetables.
  • Meat shares — offered by livestock farms, structured similarly but delivered monthly or at the end of the season as frozen packages.

Pickup and Delivery Models

Distribution varies by farm. The three most common models in Canadian CSA operations are:

  1. On-farm pickup — members drive to the farm on a set day each week. This is common in rural and peri-urban areas and allows members to see the farm directly.
  2. Community drop-off points — the farm delivers boxes to centralized locations in towns or city neighbourhoods. Members collect their box from a host site such as a community centre, church, or participating business.
  3. Home delivery — the farm delivers directly to members' addresses, usually for an added fee. More common in dense urban areas and increasingly offered by larger operations in Toronto, Vancouver, and Montreal.

Payment and Commitment

The pre-payment structure is central to what makes CSA different from buying produce at a market. Farms receive funds before spending on seeds and labour, which reduces financial exposure during the planting period. Members, in turn, accept that a difficult growing season — drought, pest pressure, or early frost — may result in smaller or different boxes than anticipated.

Some farms soften this arrangement by offering payment plans: a deposit at sign-up and the balance partway through the season. A smaller number operate on a "pay what you can" sliding scale to improve accessibility, though this is less common in Canada than in some American models.

What to Ask Before Joining

Before committing to a CSA subscription, it is useful to clarify several practical points with the farm:

  • What is the pickup or delivery schedule, and what happens if you miss a week?
  • Does the farm allow share swaps or holds during vacations?
  • What growing practices does the farm use? Are they certified organic, or do they use practices consistent with organic production without formal certification?
  • How does the farm communicate with members — email newsletter, app, or social media?
  • What is the refund or transfer policy if your circumstances change mid-season?

Many CSA farms in Canada publish weekly newsletters listing what is in that week's box, along with recipe suggestions and farm updates. These communications are often the primary channel between farmer and member throughout the season.

External References

For additional context on agricultural practices and food systems in Canada: