Skyscraper Senecio, Big blue chalk sticks
Actually in the Asteraceae family! Requires well draining soil. Toxic plant.
Drought tolerant but don’t leave the soil dry for too long. Water occasionally during growing season.
Bright light, sunny window sill. If it doesn’t get enough light, it will get leggy.
Very tough, can go to as low as -6.7 degrees C, but ideally not below 10 degrees C.