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In Canada the work follows a short, intense growing season. Beds wake up late, weeds race ahead in June, summer heat and watering rules test new plantings, and fall cleanup has to be done before the snow. It is also more regulated than many homeowners expect: provinces and municipalities limit which pesticides can be used in gardens, cities set watering hours, and some invasive plants, such as giant hogweed, are dangerous to handle.
This page follows the garden calendar, then covers core bed care, composting and yard waste, the pesticide and watering rules that apply to gardens, safe handling of invasive plants, and the choice between a regular gardener and seasonal visits.
Garden maintenance calendar: spring cleanup, summer care and fall cleanup
Spring cleanup starts once beds have thawed and dried enough to walk on without compacting the soil. Matted leaves, winter debris and last year's perennial stems come off, edges are recut, and beds are weeded, topped with compost and mulched before weeds get going. It's also the time to spot winter damage and salt injury along the street and driveway.
Summer is about staying ahead: weeding before weeds set seed, deadheading, staking tall perennials, watering new plantings during dry spells within local rules, and watching for pests and disease. Fall cleanup removes diseased foliage and spent annuals, protects tender plants and gets hoses and containers ready for winter.
Fall cleanup doesn't have to leave beds bare. Leaving some healthy perennial stems and seed heads standing over winter gives native bees and other pollinators hollow stems to shelter in and gives birds seeds to eat. Those stems can be cut back in spring once the weather warms.
Flower bed maintenance: mulching, weeding, deadheading and dividing perennials
Most of a gardener's time goes into a handful of recurring tasks. Done regularly, they keep beds looking tended with far less effort than a once-a-year rescue.
- Mulching: shredded bark, wood chips or leaf mulch keeps soil moist, evens out its temperature and smothers weed seedlings, and is kept away from stems and plant crowns to avoid rot.
- Weeding: pulling weeds while they are small and before they flower stops them from reseeding, and deep-rooted perennial weeds need the whole root out.
- Deadheading: removing spent flowers keeps many annuals and perennials blooming longer and prevents self-seeding where it isn't wanted.
- Dividing perennials: clumps that are crowded or dying out in the centre are lifted, split and replanted, usually in spring or early fall, which renews them and yields plants for other beds.
- Edging: a clean edge between lawn and bed keeps grass from creeping in and makes the whole garden look cared for.
Composting garden waste and municipal yard waste collection
A garden produces a steady stream of trimmings, spent plants and leaves, and much of it can be composted on site. A mix of green material, such as fresh clippings, and brown material, such as dry leaves, breaks down into compost that goes back on the beds, and shredded leaves make a free mulch.
What can't be composted at home goes to municipal yard waste collection, which most cities run on set dates with rules on containers and bundles; Montreal, for one, doesn't accept plastic bags. Keep diseased plants, weeds that have gone to seed and invasive species out of the home compost, since a backyard pile rarely gets hot enough to destroy them.
Garden pesticide and watering rules in Ontario, Quebec and Montreal
Pesticide rules cover flower beds and vegetable gardens as well as lawns. Ontario's cosmetic pesticides ban limits gardens to products whose active ingredients all appear on the province's Allowable List, with health and safety exceptions such as poison ivy and giant hogweed. In Quebec, the Pesticides Management Code bars the highest-risk pesticides from lawns, trees, shrubs, vegetable gardens and flowerbeds, and municipalities such as Montreal add their own bans. Ask any gardener which products they plan to use, and expect hand weeding, mulch and low-risk options first.
Watering is regulated too. In Montreal, automatic systems may run only from 3 to 6 a.m. and portable sprinklers from 8 to 11 p.m., on even or odd days matching the address, and many other cities publish summer schedules they can tighten during a heat wave or shortage. Watering deeply at the base of plants, early in the day, and keeping beds mulched let a garden get by with less.
Invasive plants in the garden: giant hogweed and safe removal
Some garden escapes are more than a nuisance. Giant hogweed, a very tall perennial with broad umbrella-shaped clusters of white flowers, has sap that causes severe burns when skin that has touched it is exposed to light. Ontario warns that painful blisters appear within 48 hours, and Quebec notes that the sap's toxins are activated by sunlight and by artificial UV light. If sap gets on your skin, wash it well with soap and water and keep the area out of the sun; if it gets in an eye, rinse it immediately and see a doctor.
Never cut or pull giant hogweed bare-armed. Provincial guidance calls for waterproof gloves, long sleeves, long pants and eye protection, and Ontario recommends hiring a professional. No part of the plant should be composted, and Ontario says not to burn it; both provinces describe bagging cut plants and leaving the bags in the sun before disposal. In Quebec, its sale and cultivation are prohibited as of June 4, 2026 under the new regulation on invasive exotic plant species, which also covers buckthorn, as the hedge trimming page explains.
Hiring a regular gardener vs seasonal garden cleanups
A regular gardener visits every week or two through the growing season, which keeps weeds from getting ahead, catches pests and disease early and lets one person learn your garden. It suits large or densely planted yards, owners who travel in summer, and gardens that need to look good all season.
Seasonal visits, typically a spring cleanup, a summer tune-up or two and a fall cleanup, suit smaller or low-maintenance gardens and owners who enjoy the day-to-day care themselves. Many homeowners start with seasonal visits and add regular care once they see how fast weeds return in June.
- Ask which tasks each visit includes: weeding, deadheading, edging, mulch top-ups, watering or cleanup.
- Confirm whether debris removal, mulch and compost are part of the service.
- Look for plant knowledge: a gardener who can tell a perennial seedling from a weed saves plants.
Garden Maintenance: frequently asked questions
Should I cut back perennials in the fall or in spring?
Both have a place. In fall, remove diseased foliage and plants that collapse after frost, but leave some healthy stems and seed heads standing for pollinators and birds. Cut those back in spring once new growth starts.
How much mulch do garden beds need?
Enough to block light from weed seeds and slow evaporation, topped up as it breaks down. Keep it away from stems, crowns and tree trunks, where it holds moisture against bark and invites rot. Gardeners usually refresh mulch in spring after weeding.
Can a gardener spray weeds in my flower beds?
Only with products allowed where you live. In Ontario, gardens can only be treated with pesticides whose active ingredients are all on the Allowable List, apart from health and safety exceptions. Quebec bars the highest-risk pesticides from flowerbeds and vegetable gardens, and municipalities such as Montreal add their own bans. Most garden weed control is done by hand, with mulch and dense planting.
How do I get rid of giant hogweed safely?
Don't touch it with bare skin. Wear waterproof gloves, long sleeves, long pants and eye protection, or hire a professional, as Ontario recommends. Don't compost or burn it; provincial guidance describes bagging cut plants and flower heads and leaving the bags in the sun before disposal.
How often should a gardener come?
It depends on the garden and how much you do yourself. Every week or two keeps a large, densely planted garden under control, while a smaller or low-maintenance garden may need only a spring cleanup, a summer visit or two and a fall cleanup.
Sources
- Pesticides for home lawns and gardens — Government of Ontario
- Pesticide application on green spaces, golf courses, indoor plants and for pest management — Gouvernement du Québec
- How to use household pesticides — Gouvernement du Québec
- Use of pesticides — Ville de Montréal
- Water use regulations: what you need to know — Ville de Montréal
- Green waste collection: how it works — Ville de Montréal
- Giant hogweed — Government of Ontario
- Identifying and getting rid of giant hogweed — Gouvernement du Québec
- Giant hogweed — Gouvernement du Québec
Written by the LokalMatch editorial team. Reviewed by Zubair Afzal on September 10, 2026. How we write and check our guides