• One Variety of Milkweed May Harm Monarch Butterflies

    Planting a bright orange milkweed in your garden? Make sure it’s not tropical milkweed. Asclepias curassavica has many common names including tropical milkweed, bloodflower, Mexican butterfly weed and wild ipecacuanha. It does not winter over in Ontario but has been grown as an annual.  In southern U.S., including Florida, it is widely planted. Research from the University of Georgia suggests that tropical milkweed may be doing more harm than good. Tropical milkweed can play host to ...

  • Gypsy Moths and Other Pests Active

    Ontario Ministry of Agriculture, Food and Rural Affairs (OMAFRA) has posted a notice about Gypsy Moths reaching a new stage in their life cycle, making them no longer susceptible to control using the biocontrol Bacillus thuringiensis. Now that the larvae are showing their yellow heads, it is time for homeowners to purchase tree bands for use in early July to trap adults moths before they lay their eggs. (The existing larvae can be found in bark ...

  • Black Spots and Blighted Leaves on Native Maples? Don’t Panic.

    Ontario Ministry of Agriculture, Food and Rural Affairs (OMAFRA) has posted a notice about the high incidence of leaf spot and leaf blight on several native species of maple this year. They explain that unusually cold spring, which prolonged leaf emergence, and the near constant wet conditions were perfect for supporting several fungal and bacterial diseases. However, they also explain that these symptoms do NOT require any treatment, as the new leaves now emerging will be fine. For full ...

  • Books and Bees; Magazines and Mulch: Toronto Master Gardeners at Your Local Library

    The Toronto Master Gardeners partner with the Toronto Public Library (TPL) to provide free "Ask an Expert" talks on a wide range of gardening topics in April and May. Check out the TPL web site here to see which sessions might fit into your schedule or just the visit the Events listings on this site.

  • Watch Out for Black Knot

    Before your Prunus sp. shrubs and trees are fully leafed out, you can easily see if there are any Black Knot infections. Monitor gardens and adjacent wild areas for large black growths on previous years twigs. Prune the cankers out, back quite close to the main stem BEFORE LEAVES EMERGE. Destroy all pruned twigs. Pruning too shallow retains the undetectable, developing canker on the tree and does nothing to limit the disease. For more information from the Ontario Ministry ...

  • Spring Has Sprung and So Have the Pests

    The Ontario Ministry of Agriculture, Food and Rural Affairs (OMAFRA) has issued a notice of the emergence of various pest insects. Specifically, now is the time to check for Cooley spruce gall and Eastern spruce gall adelgid overwintering females; gypsy moth, Eastern tent caterpillar and viburnum leaf beetle egg masses; and Bagworm "cones". For images and details for the appropriate actions to take, visit the OMAFRA site here.

  • Want to Be a Master Gardener? Entrance Exam September 25!

    Passionate about gardening? Passionate about volunteering? Toronto Master Gardeners might be just the group for you. The first step in the annual recruitment process is a no-charge entrance exam to assess your basic gardening knowledge. The only test date this year is September 25. There's no fee or registration required. 7 pm, Monday, September 25 Toronto Botanical Garden 777 Lawrence Avenue East at Leslie Free parking. Upon passing the test, you will participate in a personal interview to assess ...

  • Young Urban Forest Leaders Program Accepting Applications Now

    A joint project of the City of Toronto and LEAF, the Young Urban Forest Leaders (YUFL) Program is designed to provide young women with hands-on experience in the field of urban forestry and community engagement. This unique five month program includes 20 hours of formal arboriculture training, additional project-specific workshops and ongoing mentoring. Applicants must be femaleidentified, aged 18-24 and live in the City of Toronto. There is an information session on Saturday, March 18, 10AM to 12PM ...

  • Toronto Master Gardeners Lead Insider Tours of Canada Blooms

    One of the best deals in town is the ticket to an Early Morning Tour at Canada’s largest flower and garden show, Canada Blooms, in the Direct Energy Building at Exhibition Place, Toronto. Morning Tours will be held Friday, March 10; Saturday, March 11; Wednesday, March 15; Thursday March 16; Friday, March 17 and Saturday, March 18 at 8:15 am. Toronto Master Gardeners will be leading small groups through the gardens on the festival floor. There are ...

  • Master Gardeners On Stage at Canada Blooms

    Toronto Master Gardeners and their peers from across the province will be speaking on a wide range of gardening subjects at Canada’s largest flower and garden show, Canada Blooms, in the Direct Energy Building at Exhibition Place, Toronto. The Master Gardener presentations will take place on the Hortus TV Solutions Stage on Saturday, March 11; Tuesday, March 14; Friday, March 17 and Sunday, March 19. All presentations are included in your admission ticket for the day. Just ...