I made a Shamrock Tree again this year. Things started off slowly this time because I'd been feeding too much calcium and the foliage was yellow. However, a severe cut and leaching the soil and then multiple sprays with Miracle Gro Fertilizer made it turn out nice again. It'll look like this right through to November. It can take a bit of frost; but not a really hard freeze. So, since my first frost usually hits here in early October, early November is when I will move the plants back inside.