Well, I finally found a bag of ciment fondue to build some bonsai planters. Just wondered if anyone had used this and if they tried mixing it with sand or not. I have found two references - one book and one online posting and neither really go into much detail. I did make a rock/mountain planter using left over thin set cement and it came out good. I also poured a planter using hypertufa with successs. Looking forward to having a planter large enough to plant a small bonsai forest, I'm using Redwoods for this! Any care tips for Redwoods would also be appeciated - like do I dare trim their tips - or should I leave them alone like some pine trees?