Growing an acorn in water
I've started an acorn growing in a vase of water. I gathered the acorn around October 2020 and put it in a bag of wet tissue in the fridge for a few weeks, then in a cool cupboard. Once the roots had grown, I then put it in this vase and it has been growing nicely. But how much longer can I keep it going in a vase of water? I guess I should transfer it to soil at some stage, but when. Any advice will be appreciated. Thanks.