I've actually dabbled in growing grapevines indoors, and it's quite an interesting journey! Here are some insights from my experience and research:
Variety Recommendations: You're right to focus on compact varieties. Consider 'Pixie Grapes,' which are bred specifically for small spaces and container growing. Another option is the 'Pinot Meunier,' known for its small clusters and adaptability. They won't produce as much as outdoor vines but can still be fruitful.
Light Requirements: Grapevines do require a lot of light to thrive. If natural light is limited, full-spectrum LED grow lights are probably your best bet. These lights simulate sunlight and support photosynthesis effectively. Aim for at least 12-16 hours of light daily, especially during the growing season.
Support Structures: Given the limited indoor space, you can use vertical trellises or even wall-mounted systems. Some people use wire grids or repurposed ladders. These can be both functional and decorative, adding a nice aesthetic to your indoor garden.
Overall Care: One challenge is ensuring proper air circulation to prevent mildew and fungal diseases, which are common with grapes. A small fan can help with this. Watch out for common pests like spider mites and aphids; neem oil can be a natural remedy. Be cautious with watering—grapevines prefer it on the drier side, so allow the soil to dry between waterings.
Climate Control: Grapevines like a dormancy period, which can be a bit tricky indoors. During winter, you might want to mimic these conditions by keeping them in cooler areas of your home, ideally between 30-50°F. This can boost their productivity in the long run.
Have you considered what you'd like to do with your grape produce, like fresh eating or maybe trying your hand at homemade mini wine batches? That might further influence which variety you choose to grow. If you need more info on any specific aspect, feel free to ask!