Wow, Ursula! That Den. aggregatum looks terrific!
My plant is bigger but younger. It was a first time bloomer. When I went to Fuchs last April they had trays of young aggregatum that had been cut into approx. 5" squares for $15. While mine was winding down with its first blooms last month, the little yellow arrows where blooms emerge started to swell and I thought there were going to be more spikes. This was happening on the second joint up. So, lo and behold, they were new leads. Actually, more like keikis 'cause they are a bit up there in the air. I've had aggregatum before but don't recall this happening. Maybe doing this because it sits a bit low in a basket.