My plants have become so large that it takes a gargantuan effort to repot them. I've already used 6 cubic feet of Miracle Grow Potting soil and had to purchase a number of 12"-21" pots just to fit the larger ones. I got the "King Tut" papyrus when it was 3 feet tall in the beginning of the summer. See it in the middle picture. It stands probably 10 feet now. The ferns and spider plants are enormous as are the asparagus ferns. I use a dolly to move them around. And I'm still not done. Have spent 3 days already and am just trying to beat any cold snap that might occur at any time.