During the Winter months I grew seedlings in the basement. These were the first primitive attempts to grow seedlings before people like wbpdeer turned growing seedlings into a science. The advantage of growing seedlings is that I could grow hybrids and rare trees that aren't commonly available. The basement has since been finished, so I lost my nursery.
This was back in the day when the learning curve was straight up! In this pic I have lighting, that I didn't have the previous year. We didn't know what soil to use, how much and how often to water, and if we got lucky chestnuts sprouted. I was among the best growers at the time. LOLThanks Brush for a mention but there are many indoor growers on this forum - some of them are Chinese Chestnut growers.
That is a topnotch photo.