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Filling a raised bed: The right layering & plant selection

Hochbeet

A raised bed offers numerous advantages: It allows for back-friendly gardening, promotes faster plant growth thanks to better thermal insulation, and ensures optimal nutrient supply. However, to get the most out of your raised bed, proper filling is essential. In this article, you'll learn how to optimally layer your raised bed, which plants are suitable for sowing in March, and which measures are useful for protecting your plants.

Why three layers in the raised bed?

Properly filling a raised bed is done in three layers. This proven principle ensures that the plants are supplied with important nutrients for many years and that the soil remains loose and well-aerated.

  1. The bottom layer: This consists of coarse organic material such as branches, twigs, or coarse wood chips. This layer ensures good aeration and prevents waterlogging. At the same time, it serves as drainage and promotes good water flow.

  2. The middle layer: This is where semi-ripe garden waste such as leaves, grass clippings, or shredded shrub cuttings are used. This layer gradually decomposes, releasing valuable nutrients.

  3. The top layer: The top layer consists of high-quality compost, which serves as a direct planting layer. It provides your plants with all essential nutrients and forms the optimal breeding ground for vegetables, herbs, and flowers.

This three-layer structure ensures a long-lasting supply of nutrients and active heat development inside the raised bed, which helps the plants grow faster.

What do you plant in the raised bed in March?

March marks the start of the gardening season and is ideal for sowing cold-resistant vegetables and herbs. Particularly suitable are:

  • Salads: Lamb's lettuce, lettuce and arugula thrive even at low temperatures and can be harvested early.
  • Root vegetables: Radishes, carrots, and beets are perfect for early planting as they tolerate cooler temperatures.
  • Cabbage varieties: Early cabbage, broccoli and kohlrabi can be sown now or planted as young plants in the raised bed.
  • Herbs: Parsley, chives and dill can be sown from March onwards and will enrich your kitchen with fresh flavours.

An additional tip: Use mixed crops by planting plants with different nutrient requirements next to each other. This avoids one-sided nutrient depletion of the soil and promotes growth.

Tips for planting raised beds

To ensure your plants thrive in the raised bed, you should follow a few basic tips:

  • Consider crop rotation and mixed cropping: Change crops annually and combine different crops to ensure sustainable soil management.
  • Install vole mesh: To protect your plants from voles, you should install a close-meshed vole mesh at the base of the raised bed when you build it. This will prevent the rodents from burrowing into the bed from below and damaging the roots.

  • Don't forget to water regularly: Raised beds dry out faster than regular beds due to their elevated position. Regular watering is therefore essential.

  • Use frost protection: Since night frosts can still occur in March, it's recommended to protect sensitive young plants with a fleece cover or a cold frame. These measures not only protect against frost but also ensure a favorable growing environment for the plants.

  • Use organic fertilizer: To maintain the nutrient supply in the top layer of soil in the long term, you can incorporate compost or other organic fertilizers.

Conclusion

A raised bed offers many advantages and is a real boon for hobby gardeners, especially in spring. With proper layering and careful plant selection, you can expect the first harvest as early as March. Remember to protect your plants from pests with a vole screen and use fleece for protection during frost.

You can find more valuable information on the design and construction of a raised bed in our blog article on building a raised bed . With the right measures, nothing stands in the way of a successful gardening season! Happy gardening!