Clean them? I've never seen a reason to clean them... I have some algae along the sides of my large outdoor ones but I don't mind it much - can't survive inside the pot w/o light and dries up between watering. And I have some calcium stains from my water but those don't both me much as well. I would recommend a bleach solution spray or H2O2 to clean them if you are picky. IMO a good drying out in the sun is all they really need.
I want to say that I've documented the smart pots with more rapid growth - Here for instance is the first round of this thread.
Started all in plastic - (ignor the two larger ones)
Week later and they already look bigger in the SP - of course not a fair comparison due to soil amounts.
Another week later - these pics do not include the 2 larger ones, these were all started the same day
VC
WR
White Russian x White Russian - Showing pistols
Chocolope 3
Rest:
I have one this round in a smart pot and it seems to be larger already as well but we shall see. I really think it's totally situational dependent though. If hard plastic works for you then definitely continue with it
. I have heap loads of every sized hard plastic pot
so if they do better this round in my attic I'll definitely continue with them. Definitely not dragging a 65g up to the attic anytime soon
No idea what that bolding is about, wont let me get rid of it.
Oh, I should throw in that smart pots are really really tough. I was dragging my outdoor ones around on the cement all the time filled with a couple hundred pounds of soil and just recently I moved all three of them full from my last place to this one. Just picked em up by the handles and stacked them into the car. I was blown away, a year outdoors and full of soil and every single handle held up no problem, even while we swung them into the car. 65g is alot of soil - ~6 1.5cuft bags and Happy Frog isn't the lightest soil, especially when amended with clay.