Yes, please build up several layers if vegetables, lettuce, etc. are to be planted.
Do not use expanded clay, it is not needed as it is only used for training, which is not necessary here as the raised bed itself has a training layer.
And then three layers:
- At the bottom: 10 cm of branches, leaves, plant cuttings, chaff, wood shavings if necessary. The material rots over time, releasing nutrients and helping with water circulation at the same time.
- Then compost (e.g. 60 litres of Migros organic garden compost)
Migros organic garden compost (30 l)
- Then raised bed soil (e.g. 40 litres of organic raised bed and vegetable soil)
Compo BIO raised bed and vegetable soil - peat-free (40 l, peat-free soil)
Migros-Bio Garden raised bed and vegetable soil (30 litres, peat-free soil)
Fill the raised bed piece by piece and loosen the soil (crumble the clods by hand). Water lightly. Leave to stand for 2 or 3 days while it settles. Top up if necessary.
Leave a rim when filling so that the young plants are somewhat protected from the wind.
When filling, make sure that the float can move freely.