Best Soil Mix For Cuttings

If you are interested in starting a nursery, or are wondering how professional grower’s produce high quality plants, then this is the perfect post for you!

We are going to show you how to mix the perfect medium for rooting cuttings. This mix has been tried and tested in a commercial nursery and has been perfected by professional horticulturalists, so you can trust it’s a good one! For your own convenience you cal also download your own copy of our infographic detailing this information here

Getting Started

To mix the perfect rooting medium, you will need:

  • Peat moss. This is the dead, decomposed remains of plant material, mainly mosses, that have accumulated over many years. Peat moss is an important additive to any growing medium because it retains water and nutrients and improves structure.
  • Coir. This is the fibre of dehusked coconut shells. It is an organic, natural additive that can also be used in hydroponics as an organic growing medium. It is used in this mix to retain moisture.
  • Vermiculite.  This is a heat-expanded mineral that will aerate your medium, improve water retention and even release a small amount of nutrients into the mixture.  
  • A slow release fertilizer. There are many commercial options available. he fertilizer beads bind to the soil when they are wet. Under warm temperatures, the coat of the beads expand and slowly release nutrients into the growing medium. Our fertilizer is specifically formulated for plant plugs and will supply enough nutrients for 2-3 months.
  • A cup or any other measuring implement, and
  • A large bucket or wheelbarrow to mix your medium.

As horticulturalists, we strongly advise that you use sustainably sourced peat moss and coir.

Mix Your Medium

Once you have readied all of your equipment, place 2 cups of peat moss, 2 cups of coir and 1 cup of vermiculite into the bucket. This medium will therefore consist of 40% peat moss, 40% coir and 20% vermiculite. The peat moss and vermiculite absorb water whilst keeping the medium aerated, and the coir also improves water retention. However, these materials have very little to no mineral content. This is why we have included a slow release fertilizer in the mix. The amount you mix into your growing medium will depend on the amount of medium you need, so be sure to read the instructions before you add your fertilizer. In this case, we used roughly 2-3kg per m3.

Make sure your medium is thoroughly mixed with your peat moss, coir and fertilizer evenly incorporated. Fill up your cutting trays with the medium and soak the trays with a light mist before you start planting your cuttings.

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