Posted: 16/03/2015 at 09:13
I think a rotavator would be better than a digger, I use one in my veggie garden, which is well over 200 m2. The only problem is that they tend to chop up perennial weed roots like bindweed so you end up with more weeds if you don't pick them all out.
Woodchips are fine as a mulch to keep weeds down and moisture in but they shouldn't be dug into the soil, especially when fresh. They tie up nitrogen and inhibit natural fungi in the soil which makes it less fertile. That is one reason why they are a weed inhibiting mulch. You can add wood that has been through a shredder to a compost heap to rot down.
We had a firm to level and sow our lawns as the area was over 2000 m2. They rotavated, didn't remove perennial weeds or use weedkiller. With hindsight I think it would have been better if the whole area had been treated with glyphosate and left to die down before the work started. But not everyone wants to use weedkillers.
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