Which ferts and where?

[shibui]

How about fertilising trees in the ground? I have a planter box full of composted cow manure, mushroom compost, fine soil and organic potting mix. I assume any trees going in (will be Japanese Maples) will not need as much fertiliser as a tree in an open inorganic pot, as the water/fertiliser will not run out easily and the soil can also provide some of it's own nutrients?

There is less need for extra fert when trees are in the ground. I add manure and compost to the ground before I plant stock to grow on then nothing added until they are dug out a year or 2 later. Yours will still be in a container so you will still need to water more than in the ground. Watering leaches nutrients out of the mix. You also have organic components that need Nitrogen to break down so you will still need to provide some nutrients to get best growth. Trees will still grow without added fert but maybe you want to maximise growth rates?
It really does not matter what fert you use on your maples in the planter box but I think you will get better growth if you give them something every month or so.

[kcpoole]

Neutrog "Sudden Impact for Roses" Pellets applied every 6 weeks.

Hey Ken,

do you apply the Neutrog Sudden Impact straight on top of the soil/dressing stones, or do you put it in fertilizer cups?

Also wondering if you put it on non flowering/fruiting trees like pines/conifers and other natives?

Cheers,
Pearcy.

I just sprinkle it on the surface, I figure that way it will not look as bulky and no extra things to fiddle with when applying it Again more of my Kiss principal
Fert cups will work and quicker to remove in order to show the tree, but i figure if i am going to do that then i will freshen the subrate on the top anyway so no issue there.

Ken