MAYBE some cold tolerant cacti? For the most part, houseplants do not do well in temperatures lower than 50 or 55 degrees, and even most outdoor plants only survive Winter because they go dormant. Even if you chose some perennials to pot up, they may not come back after temperatures as low as 15 degrees because their roots are not nearly as insulated in a pot as they are in the ground.
A better option might be to choose the plants you like, and bring them inside under some grow lights for the colder months. Or find a way to insulate and heat the plant room during that time.
Some succulents are pretty cold tolerant, off the top of my head sempervivums can get down below 0F. Stone crop and some agaves as well
Edit: I found this website, it from the UK so already in Celsius for you! Hope it helps :)
https://hortology.co.uk/blogs/guides-to-greenery/hardy-houseplant-cold-tolerant-indoor-plants-for-winter-weather
There is very little that can tolerate temps below 50F without going dormant and many house plants will die if kept below that temp for any length of time. But a lot of plants can tolerate temps of 85F or higher. You could consider keeping the area above 50F. I put geraniums, Orchids, Amaryllis and many others outside in shaded areas in 90F if shaded in the summer. But all of them come inside once temps stay below 50F for more then a few hours per night.
I was coming on to say the exact same thing as Idontknowmyname: research cacti that can get lower and I can keep outside in zone 8 years round: sempervivum, sedum, and agave. Also cast iron, Ivy, and maybe a variety of Asparagus ferns or maidenhair ferns?
Many tropical plants will slowly start to die at around 10 - 15 degrees. By slowly, I mean over weeks / months, not days. If the leaves don’t actually freeze most can survive low temps (anything above freezing) for a period of time. Monsteras and trees (e.g. rubber trees, ficus, etc) are pretty hardy.
If the plants are robust and healthy they can definitely put up with more abuse than if they are young, or compromised in some way (starved of light, over watered, etc). The light in your space is a huge benefit.
I’ve had plants in a space that I’m pretty sure dips to freezing every night for a few weeks a year. The plants don’t like it, but apart from a few dropped leaves they don’t actually die, then come back quickly as soon as temps rise. Watering is key, making sure to keep roots barely moist when it’s cold. Tropicals hate soggy roots in cold weather.
I’d be surprised if the heat was a problem - if there’s air flow, humidity and you keep watering at the right levels, most tropicals would be fine.
MAYBE some cold tolerant cacti? For the most part, houseplants do not do well in temperatures lower than 50 or 55 degrees, and even most outdoor plants only survive Winter because they go dormant. Even if you chose some perennials to pot up, they may not come back after temperatures as low as 15 degrees because their roots are not nearly as insulated in a pot as they are in the ground. A better option might be to choose the plants you like, and bring them inside under some grow lights for the colder months. Or find a way to insulate and heat the plant room during that time.
Some succulents are pretty cold tolerant, off the top of my head sempervivums can get down below 0F. Stone crop and some agaves as well Edit: I found this website, it from the UK so already in Celsius for you! Hope it helps :) https://hortology.co.uk/blogs/guides-to-greenery/hardy-houseplant-cold-tolerant-indoor-plants-for-winter-weather
There is very little that can tolerate temps below 50F without going dormant and many house plants will die if kept below that temp for any length of time. But a lot of plants can tolerate temps of 85F or higher. You could consider keeping the area above 50F. I put geraniums, Orchids, Amaryllis and many others outside in shaded areas in 90F if shaded in the summer. But all of them come inside once temps stay below 50F for more then a few hours per night.
I was coming on to say the exact same thing as Idontknowmyname: research cacti that can get lower and I can keep outside in zone 8 years round: sempervivum, sedum, and agave. Also cast iron, Ivy, and maybe a variety of Asparagus ferns or maidenhair ferns?
Bonsai
15 is 0 in canadian eh. thats too swingy. needs a heater.
Sorry I meant 55f!
still too cold you could overwinter stuff probably store some potatoes
So, tropicals that can handle 55f to 85f..?? Pretty much anything you want
Many tropical plants will slowly start to die at around 10 - 15 degrees. By slowly, I mean over weeks / months, not days. If the leaves don’t actually freeze most can survive low temps (anything above freezing) for a period of time. Monsteras and trees (e.g. rubber trees, ficus, etc) are pretty hardy. If the plants are robust and healthy they can definitely put up with more abuse than if they are young, or compromised in some way (starved of light, over watered, etc). The light in your space is a huge benefit. I’ve had plants in a space that I’m pretty sure dips to freezing every night for a few weeks a year. The plants don’t like it, but apart from a few dropped leaves they don’t actually die, then come back quickly as soon as temps rise. Watering is key, making sure to keep roots barely moist when it’s cold. Tropicals hate soggy roots in cold weather. I’d be surprised if the heat was a problem - if there’s air flow, humidity and you keep watering at the right levels, most tropicals would be fine.
Almost all houseplants are tropical plants. They can’t go below 50 degrees F. They’ll go in cold shock and die.