Late Winter Garden Prep in Ottawa: What to Do Now for a Thriving Spring

Late Winter Garden Prep in Ottawa: What to Do Now for a Thriving Spring

It may still look like winter outside, but late February and early March are some of the most important weeks of the gardening season here in Ottawa. While the ground is frozen and snow is lingering, there’s plenty you can do right now to set your landscape up for success.

At Antheia Gardens, this is the time of year we start planning, prepping, and getting excited — and you should too.

Here’s your practical late-winter garden checklist — no seed trays required.

1. Plan Your Landscape Before Spring Gets Busy

Late winter is the perfect time to:

• Redesign garden beds
• Add new perennial borders
• Expand pollinator-friendly plantings
• Plan foundation plantings or privacy screens
• Add raised planters or decorative containers

Think about:

• Sun patterns (where does snow melt first?)
• Drainage areas after heavy rain
• Wind exposure
• Sightlines from inside your home

This is also the best time to think about bloom succession — planning for colour from early spring through late fall instead of just one big flush in June.

2. Prune Trees & Shrubs While They’re Dormant

Late winter and early spring is ideal for pruning many trees and shrubs before active growth begins.

Good Candidates for Late-Winter Pruning:

• Apple & pear trees
• Panicle hydrangeas (Hydrangea paniculata varieties)
• Summer-flowering shrubs
• Damaged or crossing branches on deciduous trees

Avoid pruning spring-flowering shrubs like lilac or forsythia right now — you’ll remove this year’s blooms.
Proper structural pruning now improves plant health, airflow, and flowering later in the season.

3. Refresh and Plan for Better Soil Health

Healthy soil = healthier plants and stronger root systems.

Before the rush of spring:

• Top up compost bins
• Order compost or soil amendments early
• Plan to refresh ornamental beds
• Consider improving soil structure in compacted areas

In Ottawa’s clay-heavy soils, improving drainage and organic matter makes a noticeable difference in plant performance.

4. Inspect Hardscaping & Garden Structures

Winter can be tough on outdoor spaces.

Now is the time to:

• Check for shifting pavers or stones
• Inspect retaining walls
• Assess fences or garden edging
• Evaluate decks, pergolas, or privacy structures
• Plan upgrades before contractor schedules fill up

Catching small issues now prevents costly repairs later.

5. Maintain & Sharpen Your Tools

A quick hour now saves frustration in April.

• Sharpen pruners and loppers
• Oil wooden handles
• Clean pots and decorative containers
• Check hoses for cracks
• Inspect garden gloves and protective gear

Well-maintained tools make spring work faster and more enjoyable.

6. Dream Bigger This Year

Late winter is also inspiration season.

Maybe this is the year you:

• Add a layered perennial garden with four-season interest
• Create a pollinator-focused landscape
• Install a statement tree
• Design a calming backyard retreat
• Add lighting for extended evening enjoyment

Gardens aren’t just about plants — they’re about creating spaces that feel alive, intentional, and restorative.

Ottawa Timing Reminder

In our climate, patience is key. The average last frost falls around mid-to-late May, but preparation now makes the transition into spring seamless.

The landscapes that thrive here aren’t rushed — they’re thoughtfully planned.

Ready for Spring?

At Antheia Gasrden, we’re preparing for soil refreshes, perennial additions, and landscape upgrades. If you’re thinking about improving your outdoor space this year, now is the perfect time to plan.

Spring will be here before you know it. The work you do now sets the tone for the entire season.