• Flamingo Box Elder

    I have a flamingo box elder on my recently purchased property that looks as if it was recently planted. Is this tree invasive, does it have pests, should it be left in or removed? Any comments?…

  • Pruning Mature White Cedar Trees

    I live in Toronto. My back yard has a hedge of 40-50 ft. white cedar trees. The branches have spread 6-8 feet from the truck. I would like to prune the branches back to 4 feet. Will this harm the…

  • Best time of year for planting trees

    How late in fall can one plant a tree (and not a young, skinny one)? When in spring should one plant? Does it depend on the species? What is the best time of year for planting the following trees in…

  • Acer griseum

    Hello. I am doing a presentation on the above tree and want to ask for help in identifying any cultivars or hybrids. Thanks.…

  • Emerald green cedar turning brown

    My landscaper planted several 6-feet cedar last year. Three browned and died. He replaced them last April. Now the same three start to brown again. I watered them everyday in the summer to make sure they are not dry. The…

  • Cedar Trees leaves turning brown/yellow after Sept pruning

    The trees are 18 to 20 feet tall, about 10 -12 years old they have sun all day, the only changes is weather and we did prune them back in the 1st week of sept (1 mth ago). Is this…

  • Caterpillars on redbud

    Hello, I have just noticed web-like nests of small yellow caterpillars on the branches and leaves of my Eastern redbud. At the same time, I saw that many of the tree’s leaves have curled/ruffled edges, the veins are yellow and…

  • Problem with Pagoda Dogwood

    I have a multi-stemmed (two main stems) Pagoda Dogwood that I planted about 4 years ago.Last year it was very robust and healthy, but this year the younger ad┬áthinner of the two main stems seems to have much smaller…