Box Tree Moths (Cydalima perspectalis)

Box tree moths (Cydalima perspectalis), BTM for short, are an invasive species new to Canada in 2018. They are currently found in the Toronto area, including Scarborough and Concord in 2020 and an isolate case in St. Catharines in 2021, but they are spreading. The United States reported it’s first cases in 2021. Several government bodies, universities, nursery and landscape trades have banded together to try … Continue reading Box Tree Moths (Cydalima perspectalis)

The Weedy Orchid Helleborine

Helleborine 🔈 (Epipactis helleborine) is a weedy orchid that has been making it’s appearance more and more in home lawns and gardens. It’s ability to sprout from any small fragment of it’s rhizomes, left in the ground, makes it a very difficult plant to weed out or eradicate; especially considering these rhizomes can be deeply established. This coupled with it’s dust like seeds that can … Continue reading The Weedy Orchid Helleborine

Poisonous to Touch Weed Series: Wild Parsnip (Pastinaca sativa)

Wild parsnip (Pastinaca sativa) aka poisonous parsnip is one of the phototoxic weeds we grow here in Canada. It is a non-native and as such is an aggressive and invasive species. It is the only one of the phototoxic weeds that has a yellow flower, the others bearing white umbels. It’s pinnately compound leaves are also quite different than the palmately compound leaves of cow … Continue reading Poisonous to Touch Weed Series: Wild Parsnip (Pastinaca sativa)

Poisonous to Touch Weed Series: Giant Hogweed (Heracleum mantegazzianum)

Giant hogweed (Heracleum mantegazzianum) is likely the largest and most dangerous to touch perennial weed in North America. In Ontario it commonly reaches heights of 3-4.5m but in other parts of the world it can reach heights of 5.5m (MacDonald F. and Anderson H. 2012). There are a few other Giant Hogweed species that are a bit smaller in size but Heracleum mantegazzianum is the … Continue reading Poisonous to Touch Weed Series: Giant Hogweed (Heracleum mantegazzianum)