Posted: 26/05/2012 at 12:56
Gunnera is a bog plant from South America, the heat is not going to affect it!
For trees, dig a hole 2 the diameter of the tree and just smaller than the height of the roots. Soak the planting hole with water and add some bonemeal and compost. Add the tree - you want the root ball to be slightly above the hole to stop it from drowning in heavy rain until the roots have grown.