My fantastic mom first introduced me to concrete garden balls when she made her own years ago, and I knew once I had my own yard I wanted to make them too!
Here's how I did it...
1~ I bought these glass light covers at a thrift store for $3. Make sure there are no cracks in the glass or it will break when you fill them with concrete!
2~ Spray the inside with non-stick cooking spray- it helps in breaking the glass away from the ball at the end!
3~ Set the glass ball in a pile of dirt or sand so that it can't roll away while you're filling it and as it's curing.
4~ We used a quick setting concrete found at most hardware stores. I like the ones with fine gravel. Pour the dry mix in the bucket (we poured about 1/2 the bag in) and then add water until it reaches the consistancy of peanut butter...or maybe a little bit runnier. You don't want it too runny, but not too hard either. Play around with it!