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5 Best Seed Composts to Help your Seedlings Thrive! (2021 Review)

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In this guide we’ll take a look at the best seed composts.
We’ve compared ingredients, volume, pH and cost
to give you our top recommendations.

What is the Best Seed Compost?

IMAGE RECOMMENDED PRODUCTSPRODUCT FEATURES
  • Best seed sowing compost
  • Great value for money
  • Wetting agent included
  • Best organic seed compost
  • Encourages quick germination
  • Green waste and peat free
  • Best quality seed compost
  • Contains 14 vital minerals
  • Easy to use
  • Best fine compost
  • Wetting agent included
  • Easy carry pouch
  • Organic and vegan compost
  • Good moisture retention
  • Great value for money

More Detailed Seed Compost Reviews

Levington Advance Seed & Modular F2S Compost

FEATURES RATING PRICE
FEATURES
  • Best seed sowing compost
  • Great value for money
  • Wetting agent included
OUR RATING
100
PRICE
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Levington Advance Seed & Modular F2S Compost Review

The Levington Advance Seed & Modular F25 Compost is the best seed compost on the market. This compost is designed specifically for seed sowing and cuttings in modules, trays and pots up to 7cm tall.

This compost comes in a 75L pack and is fantastic value for money. It contains a range of ingredients to help your seeds thrive, including silver sand for improved growth. It also contains the ICL H2Gro wetting agent, encouraging your seeds to hold on to the maximum amount of water.

If you’re looking for the best seed compost mix, the Levington Advance Seed & Modular F2S Compost is our top recommendation!

Fertile Fibre Peat Free Organic Seed Compost

FEATURES RATING PRICE
FEATURES
  • Best organic seed compost
  • Encourages quick germination
  • Green waste and peat free
OUR RATING
97
PRICE
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Fertile Fibre Peat Free Organic Seed Compost Review

The Fertile Fibre Peat Free Organic Seed Compost is the best organic seed compost on the market. This compost is great quality and 100% free of peat and green waste. It’ll help your seeds germinate and grow, with most users reaching 100% germination.

This compost is very easy to use and it contains a range of ingredients to help your seeds thrive. While not the cheapest on the market, it can be used on a huge variety of seeds and it comes in a 35L bag.

If you’re looking for the best compost for seed germination without the use of peat, the Fertile Fibre Peat Free Organic Seed Compost is our top recommendation!

Levington John Innes Seed Compost

FEATURES RATING PRICE
FEATURES
  • Best quality seed compost
  • Contains 14 vital minerals
  • Easy to use
OUR RATING
93
PRICE
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Levington John Innes Seed Compost Review

The Levington John Innes Seed Compost is the best quality seed compost, suitable for all seedings and containing 14 vital minerals. This compost is specially developed with a high phosphate formula and a mixture of other ingredients for maximum germination and optimum root growth.

This compost contains a traditional and trusted mix of loom, peat, sand and fertiliser. It comes in either a 10L or 30L bag, and it can be used straight from the packet.

If you’re looking for the best quality seed compost, packed full of minerals to help give your seeds the kickstart they need, the Levington John Innes Seed Compost is the one for you!

YouGarden Seed & Cutting Compost

FEATURES RATING PRICE
FEATURES
  • Best fine compost
  • Wetting agent included
  • Easy carry pouch
OUR RATING
89
PRICE
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YouGarden Seed & Cutting Compost Review

The YouGarden Seed & Cutting Compost is the best fine compost, specifically designed for sowing seeds or cuttings. It has small particle sizes so the ingredients can best contact the seed or cutting stem growing. The fine particles also hold ample water, further helped by the wetting agent.

This compost comes in a 10L bag so it’s suitable for both small and large gardens. It has a great success rate, and can be used to help a range of seed types. The bag has a resealable easy carry pouch for added ease of use.

If you’re looking for the best fine compost for seeds, the YouGarden Seed & Cutting Compost is our top recommendation!

Vegro Fertile Fibre Seed Compost

FEATURES RATING PRICE
FEATURES
  • Organic and vegan compost
  • Good moisture retention
  • Great value for money
OUR RATING
85
PRICE
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Vegro Fertile Fibre Seed Compost Review

The Vegro Fertile Fibre Seed Compost is another strong contender for the best organic compost, suitable for those who want their seeds to grow without the use of peat or other chemicals.

This compost works just as well as its peat-containing competitors, but it’s both vegan and organic. It contains enough nutrients for a healthy start, promoting quick germination and a speedy root growth. It also offers good moisture retention.

Made from vegetable matter, this compost is one of the best options if you want to give your seeds a helping hand without the use of peat or animal products.

Seed Compost Buyer’s Guide

If you’re having trouble starting your flowers, fruits and veggies from teeny tiny seeds, a seed compost is a great investment. Helping you to germinate strong and healthy plants; seed composts contain a range of ingredients that your seeds will love.

The best seed compost will improve the drainage, aeration, pH and nutrition, encouraging even the most stubborn seeds to sprout. Not sure what to look for when it comes to the best seed compost? Check out this buyer’s guide.

Ingredients

Seed composts contain a range of minerals to help give your seeds a helping hand. While grown plants require a compost heavy in nutrients, seedlings won’t need so much, and too many nutrients can actually be harmful to new plants. Seed compost is finer than standard compost, and often contains a wetting agent to help your seedlings make the most of their water.

The main decision you’ll have to make is whether you purchase an organic or inorganic compost. Compost containing peat is popular for a reason, but many choose not to use it because of its negative impact on the environment.

Volume

Seed compost won’t last a long time once opened, so it’s important you only purchase as much as you need, to avoid wasting money. Use an online soil calculator to work out how much compost you will need to cover your garden.

pH

Soil is either acidic or alkaline, and this level will determine the sort of compost you need. Work out the pH of your soil by using a soil testing kit.

Many seed composts contain limestone or another alkaline agent that will raise the pH of your soil to the level that plants prefer. If your soil is particularly acid or alkaline, you’ll need to purchase a compost to accommodate this.

Seed Compost FAQ

Why use seed compost?

Seed compost can help your seeds to germinate and grow, encouraging healthy and strong roots. Using standard composts with seeds is a mistake, and often worse than using no compost at all. Seed compost is very fine, allowing the seeds to grow through, and it also contains less nutrients than standard compost. Too much food can be harmful to new plants, so seed compost contains just a few key ingredients.

How long does seed compost last?

If your seed compost is unopened, it should last for as long as you need. Once opened, your seed compost should be used as soon as possible, and any leftover is unlikely to be able to be stored for the next year. Once wet, the nutrients in your compost will break down and the compost will be useless within just a few months.

Compost opened then stored in a covered and dry area should last a short period of time, but we recommend using it all at once if you can.

Conclusion

A great seed compost will coax your flower and vegetable seeds to life, providing the perfect home for them to grow and thrive. For its ultra-fine consistency, great results and ease of use, the Levington Advance Seed & Modular F2S Compost is our top recommendation.

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