Best Seed Sowing Compost UK 

By  Enda

Thanks for taking your time to read our information on the best seed sowing compost that is currently available on the UK market. It's important to give your seeds the best start in life by planting them in a good quality seed compost, that will aid in their germination and healthy growth.

In general most seed composts contain a lot fewer nutrients than all-purpose compost but a high amount of phosphate, that's essential for initial root growth. It can often contain leaf mould, or peat, and is generally finer so the shoots can break their way up through it easily.

Good drainage is a must and you might want to add a bit of sand into the mix to help this. A decent seed compost will encourage your seeds to germinate and grow, during the early stages. It is designed to promote formation of strong root systems and will work really well for cuttings too. It also makes sense to always check the requirements of the species, before planting.

My Top Choices

1. Greenbrokers Organic All Purpose Potting Compost

GreenBrokers C1001 Organic All Purpose Potting Compost
  • This is an all purpose organic expandable potting compost for in and outdoor use
  • It is one of the biggest sellers on the UK market
  • This compost has been enriched with nutrients to boost plant development and health
  • Please note that this is a small lightweight, easy to carry pack - expands into 10 litres when water is added
  • It is a good choice for smaller households or flats with limited storage space

Check Amazon UK for Availability - Price when reviewed £12.45 - 88% customer satisfaction based on 8,000+ buyers

2. Levington John Innes Seed Compost for Sowing Seeds, Striking Cuttings, Delicate Seedlings

Levington John Innes Seed Compost 30L for Sowing Seeds, Striking Cuttings, Delicate Seedlings
  • This is a good choice for sowing seeds, striking cuttings and delicate seedlings
  • It as been made with a high phosphate formula and 14 vital minerals for optimum root growth
  • It is a very traditional mix of loom, peat, sand and fertiliser
  • Good all rounder for all seedlings
  • When filling or potting, firm lightly. Keep the compost moist and do not let it dry out

Check Amazon UK for Availability - Price when reviewed £12.15 - 80% customer satisfaction based on750+ buyers

3. YouGarden Seed & Cutting Compost

You Garden - Seed & Cutting Compost 10L Bag, Professional Quality Fine Grade, Resealable Bag
  • This is classed as a fine compost for sowing seeds into, or sticking cuttings in.
  • Both of the above need a fine grade of peat, with small particle sizes, to get best contact with the seed or cutting stem growing in them, as well as to hold enough water
  • This is helped by the inclusion of a wetting agent
  • It comes in a 10 litre bag with a handy, resealable, easy-carry pouch
  • Buyers say this compost is lovely and soft and airy, and they would recommend using this one.

Check Amazon UK for Availability - Unavailable - 90% customer satisfaction based on 500+ buyers

4. Nutley's 22 mm Compost Plug Pellets

Nutley's Compost Plug Pellets
  • These are dry compost discs that expand with water
  • They can be a very good choice for the perfect growing medium for your seedlings
  • To use these, you transplant when the roots are well established, and shift the whole seedling into its new home with minimum root disturbance
  • They swell to 24mm diameter by 42mm wide
  • They can be used in seed trays, or inside individual pots

Check Amazon UK for Availability - Price when reviewed £15.95 - 80% customer satisfaction based on 600+ buyers

5. Westland GRO Sure Seed and Cutting Compost

GRO Sure Seed and Cutting Compost 10L by Westland
  • This is a handy size bag and easy to lift
  • The manufacturer states that it improves germination by 25% to give your plants the best start
  • It is classed as a super fine grade with improved aeration & drainage
  • It contains seaweed & nutrients for healthy growth
  • Most buyers said they seen good growth when using this cutting compost

Check Amazon UK for Availability - Price when reviewed £7.32 - 90% customer satisfaction based on 800+ buyers

What is the Best Seed Sowing Compost?

Any of these composts will do a great job for planting your seedlings and all of them have been specifically designed to help with propogation and the forming of a strong root system. It's important not to use a standard compost at this stage as there are far too many chemicals in a normal compost and it will probably do more damage than good.

We find that this type of seed sowing compost will improve germination by around 25% and will definitely give any plant or vegetable a much better start in life. Roots are really the most important part of a plant so getting a good start always makes a big difference.

We hope this has opened your eyes to the world of seed sowing compost and good luck with your gardening.


I am someone who enjoys a little gardening. Now I am not someone who spend hours in the garden, but I do like both my front and back gardens to look really nice. Well kept lawns, neatly trimmed hedges, and borders filled with plants, make a huge difference, to how your property looks.

Enda McLarnon

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