Hi Tarev, It's Thursday night I watered them. Well, I think I am much embarrassed by myself that you have reminded me so many times checking wetness with a bamboo skewer and I haven't done it even once. Please pardon me for the ignorance. Ok, this time I first peek down under the small rocks and still see dry soil underneath. Then I use a thin chopstick pushing down into soil about 3". The upper 2" is dry and the bottom 1" shows a bit wet (dark soil). So I assume it'll be safe for maybe 3 more days w/o water. Thank you.
Oh, Cinta. Just saw your post. Thank you for reminding me that cacti are dry-loving plants. Now you bring up a new one for me: cacti vs succulents. I haven't thought about it yet. So I think my Crassula Tetragona and Pachyphytum are succ; other aloes are cacti? If so, maybe succ need bit more water? Thanks