when I bought portulaca they were blooming and had big flowers. The photo below is before they were transplanted....
AFter transplanting in a big hanging basket the bloom disappeared for a couple of weeks and the stems became leggy. then I saw new stems growing from the old stems...the new stems look weak compared to old one. Also on old stems I noticed some thread like white stuff plus the old stems also dropped their leaves. The new flowers are half the size of what the old flowers were. I have transplanted in good potting mix and I do not overwater or underwater. Earlier I kept it in shade or in filtered sunlight... since past 10 days I have started keeping in direct sunlight (90's F temperature).