Could you please help us to identity this plant growing in a Toronto garden in the sun with loam soil? Thank you.
Thank you for contacting Toronto Master Gardeners.
From the photo, I believe the plant you sent in is a Physalis alkekengi or Ground Cherry or Chinese Lantern. It is a plant with many common names. They are in the Solanaceae family so it is a nightshade related to tomatoes.
Ground cherry loves full sun and well drained soil. Once the flower is done a fruit develops with a green husk around it. In the fall the husk turns orange hence the name Chinese lanterns. The plant is easy to grow but can become invasive if not tended regularly. Many people grow them in pots to control spreading.
Here is a site with further reading on the Ground Cherry
https://www.rhs.org.uk/Plants/12872/Physalis-alkekengi/Details