Ohhh I see Malaysia is a bit different from me When #4 was in flowering for me Sun time here at longest is about 15.75 hours buds where easy to see and nearly ready to open and did so with lesser sun light time and finished flowering 12 days later. Temps where in the 80 - 92 F range at the same sun times mentioned and the time of day mine opened was 16:00 hours to 23:00 hours For now I can say your heaviest rain season might be a bit much for #4 although the soil you have it in does look nice enough to drain fast enough. Again odd #4 Messeb like water more than most succulents but doesn't like wet roots for to long of time in days the top will rot out on you if to wet to long. Your other plants would certainly benefit with a lot less water than #4 can handle Other than a season rain over watering concern I have think you'll do very well with yours. As caution I think it would be best if you could provide a tarp or tent for some over head covering during your heavy tropical rain season over the entire garden bed. I and others here appreciate you and want to see your plants in there best of flowering later too. In all honesty it's best to tell you to talk to some of your local people with the same succulent garden passion as yours and ask them what they do.

I grow Schick hybrids, most are not as tall as that one, and darker green, though the spines and ribs seem the same, and the Schick hybrids do have all of the species in them that is mentioned above, including Rebutia. Well not quiet all of them. And they can be figured out by the flower, if you have the flower chart in color to do so. Keep your labels make duplicate copies of them, and put one in the bottom of the pot. Not all of them look alike, some hardly have any spines, and others have long ones, Bob Schick used to tell them apart by looking at them. Sorry for such a long post, Echinopsis are grown just like any other cactus and need the same care, for flowering give them a low 0-20-10 fertilizer approx. The middle number must be higher, the first number very low. No water in the Winter, they must have the chill and dormant periods to flower. They are extremely hardy, will flower 6 mo. at least of the year from the end of April to the end of Sept. depending on you climate, light where you grow them, feeding. May open 4 nights depending on light. Norma

I was kind of suspicious of that, Gldno, since not only are there clumps of rose campion in her garden but also along a lonnnng section of fence. I knew surely she didn't BUY all those plants, lol.

Agree with socks...just leave the mother leaf there until it dries up, shrivels and it will detach itself from the new plant. In the meantime, it is supplying moisture and nutrients to the young plant.