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Permaculture - Net & pan system in the orchard

The plum orchard in blossomWhen we bought our house, one of the first things we noticed was a beautiful plum orchard on a north facing slope. Beautiful because the trees were mature and flowering; it was spring. But in the years after, we noticed that we "never" had many plums. Only in 2016.

Why were our plum trees in bad shape?

- The trees were planted on a cold north facing slope,
- there was probably a lot of runoff water and washing out of nutrients,
- the grass and herbs around them probably took a lot of water and nutrients,
- the trees had lots of parasytic lychen on them.

Permaculture solutions for our orchard

On the PDC with Rosemary Morrow I heard about the "Net and pan system" for orchards like ours. The idea is to make circles around the trees (as wide as the branches reach), mulch them, and connect those circles. This slows down the water, and leads the overflow from one tree(circle) to the other tree(circle).
Another benefit is that the circles accumulate leaves and build soil.

Net and pan system in the orchard

So we implemented this net and pan idea and it worked really well! 2 Of our orchard problems were solved: there was much less grass to steal nutrients and water, and we had a rainwater catchment.

Plum guild

In the circles we put heaps of leaves from the forest as mulch, and we planted some companions for the plums.
- Nasturtium to attract insects and shade the ground,
- Comfrey to pull up nutrients with its deep root, attract beneficial insects with its flowers and give a lot of mulch with the leaves that just keep growing,
- Yarrow (deep root to pull up nutrients and it attracts good insects) was already abundantly growing in the orchard,
- White clover as a nitrogen fixer. We sowed this in the grass around, not in the "pans".

Other orchard solutions

We pruned the trees lightly. Plum trees you prune in May and after the harvest in September. With these pruning sessions we brought more sun into the trees and we took away branches that were damaging other branches.

That the orchard is on a north side, is actually not a problem but a good thing. In spring our trees blossom later, and that already saved our plums two years out of 7! While our neighbours see their plum flowers killed with a late frost in spring, our trees were not even blossoming yet.

What also helps: in winter and early spring we apply a thin layer of the white clay (kaolin) from (deep in) our soil on the fruit tree trunks, to reflect the early sunlight. Therefore the trees blossom a bit later (when there's less chance on night frost). The kaolin is also a repellent for bugs.

The internet told me that lychen were not really a problem for trees. We easily brushed them off with an old broom and we'll leave it like that.

Pictures of our net and pan system in the orchard

Net and pan system in the orchard

Net & pan in the orchard

Good example net and pan in the orchard

The orchard in blossom

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