Completely gorgeous & awesome!
W/o knowing a thing about actual prickly cacti, the "same day" comment makes me wonder if it's a plant that is responding to day length. Some plants bloom during the shortest days of the year, some the longest, some closer to an equinox, and some are just opportunistic and toss up blooms whenever conditions don't prohibit.
Your post didn't include the name, hard to add to wish list. ;)
Love your Pelargoniums & Oxalis in the background too!
