Fresh green hulls of black walnuts sit beside the darker, softened ones that are ideal for extracting pigment.
September 14, 2026
Amba P
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What if the black walnuts scattered across your neighbourhood this fall held a colourful secret you could harness? In this step-by-step guide, we’ll show you how to unlock the natural colour hidden inside black walnut hulls to create your very own ink!
Masarrat surrounded by fall foliage.
September 14, 2026
Janet McKay
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Masarrat Quader has recently joined the LEAF Board of Directors. In this blog, our Executive Director, Janet McKay, interviews Masarrat about her experience and her motivation for becoming a LEAF Board member.
Shehmeen Bhatia at a LEAF planting event
August 26, 2026
Janet McKay
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Shehmeen Bhatia has recently joined the LEAF Board of Directors. In this blog, our Executive Director, Janet McKay, interviews Shehmeen about her experience and her motivation for becoming a LEAF Board member.
A mature maple tree with a large hole pruned through the middle of the canopy to accommodate an elevated utility line. © 2018 LEAF
August 18, 2026
Joel S.
Healthy trees are key to enjoying the benefits the urban forest provides, but many stressors can prevent them from thriving. Physical damage, limited growing space, pollution and environmental extremes can all take a toll. Read on to find out more about each of these stressors and what you can do to help your urban trees survive and thrive into maturity!
Participants on a LEAF tree tour taking in the canopy above
July 30, 2026
Joel S.
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Did you know that one of our most powerful healthcare tools is growing right outside? Beyond providing shade, privacy and fresh air, trees offer other, far-reaching benefits, improving our physical and mental health and bringing people together. Healthy tree canopies make for healthier communities, and there is evidence spanning every aspect of our lives to prove it. Read on to find out more!
inset of Stuart Grant on a background image of white pine.
July 07, 2026
Janet McKay
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As we celebrate 30 years, we’re reflecting on the people who have helped shape LEAF. Stuart Grant has been part of LEAF’s journey since 2007, serving on the Board of Directors through years of growth and change. In this interview, he reflects on what first inspired his commitment, the milestones he’s most proud of and why he remains hopeful about the future of urban forestry.
A group of YUFL participants pose with shovels and planting signs at a City of Toronto tree planting event on a sunny day.
June 23, 2026
Natasha Jovanovic
Imagine walking through your community and recognizing the trees around you as living neighbours — knowing their names, their stories, their significance. For many participants of LEAF’s Young Urban Forest Leaders (YUFL) Program, this is exactly what happens. Through hands-on learning, mentorship and community engagement, youth gain the knowledge and confidence to better understand, care for and connect with the urban forest around them. As LEAF celebrates 30 years of community-driven urban forestry, we are reflecting on the people who are becoming its next generation of stewards.
A mature pagoda dogwood tree, a perfectly sized tree for hesitant landlords or those with small spaces.
June 22, 2026
Amba P
If you’re a renter, you might assume that planting trees around your home is a decision driven entirely by your landlord. But tenants are often the ones who notice where shade would make hot summers more comfortable and where thoughtful landscaping could improve curb appeal. Read on to learn how you can encourage your landlord to plant trees around your home and how LEAF makes it simple.
Wound wood forming around an old pruning cut on a green ash (Fraxinus pennsylvanica) tree
June 01, 2026
Jess Wilkin
When a branch snaps, a tree doesn’t heal the way we do. Instead, it adapts. Read on to learn about the remarkably effective, long-term strategy that trees use to deal with injuries, and why proper pruning can make or break it.
LEAF staff member posing with newly planted tree
May 27, 2026
Adam James
Human activity has been impacting our climate for generations. While it is well known that trees help mitigate climate change by capturing and storing carbon, the question of which trees do this best is rarely discussed. Does species matter? Are native trees better than non-native trees? Let’s investigate!

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