I've dabbled with Saxifraga indoors, and while it's a bit unconventional, it can be a rewarding experiment! You're right that many Saxifraga species are better known for their presence in rock gardens, but some can adjust to indoor life quite well.
The key to growing Saxifraga indoors is mimicking their natural environment. They generally prefer bright, indirect light, so a spot near a north or east-facing window is often ideal. Direct sunlight might scorch their leaves, so if you're putting them in a sunnier spot, sheer curtains can help filter the light.
For soil, a well-draining mix is crucial. Consider using a blend of regular potting soil with added perlite or coarse sand. This mimics the rocky, less fertile conditions they thrive in naturally. As for the pot, terracotta is a good choice because it allows the soil to breathe and prevents it from staying too damp.
When it comes to watering, less is more! Let the soil dry out a bit between waterings—overwatering is a common issue and could lead to root rot. My approach has been to check the top inch of soil; if it's dry, it's time for a drink.
Regarding pests, keep an eye out for aphids or spider mites. These can sometimes make their home on your Saxifraga, and a simple solution of water and soap usually does the trick. Ensure good air circulation as this can help prevent such issues.
If you're looking for species that tend to do well indoors, Saxifraga stolonifera (commonly known as Mother of Thousands or Strawberry Begonia) is a popular choice. It's quite forgiving and adapts better to indoor conditions compared to some of its relatives.
Overall, Saxifraga can be an intriguing addition to your indoor garden if you're up for the challenge and willing to tinker with their care! I'd love to hear how it goes if you decide to give it a try.