I've tried growing wildflowers indoors, though not specifically the H&M collection. Generally, wildflower seeds can be tricky indoors because many varieties prefer full sun and can be quite dependent on outdoor conditions. However, you can still have success with the right setup.
Cultivation: They do well in well-draining soil and a sunny spot. A good quality potting mix should work. Keep the soil consistently moist but not soggy.
Germination and Blooming: Depending on the species, they can germinate in about one to three weeks. Flower blooming times vary, but many wildflowers will start flowering a couple of months after germination, with blooms lasting several weeks to months.
Containers: They definitely work in containers. Smaller varieties can thrive in pots as small as 6-8 inches. For mixed wildflowers, a larger, shallow container might better simulate their natural environment.
Additional Care: Ensuring they have enough light is crucial. If natural light is limited, consider using a grow light. Regular deadheading (removing spent flowers) can encourage more blooms.
Experimenting can be fun, so don't shy away from trying different approaches to see what works best for your space!