Welcome to UK420

Register now to gain access to all of our features. Once registered and logged in, you will be able to contribute to this site by submitting your own content or replying to existing content. You'll be able to customize your profile, receive reputation points as a reward for submitting content, while also communicating with other members via your own private inbox, plus much more!

This message will be removed once you have signed in.


Sign in to follow this  
Followers 0
distracted

Which Compost Trials 2014

Compost for raising plants tested

  Brand Price¹ Cost per litre Peat content Seed raising Growing on young plants Test Score
Peat-based composts
J Arthur Bower's Traditional All Purpose Compost £5.99 for 56 litres 11p 100% 5star_red.gif 5star_red.gif 81%
Verve Sowing & Cutting Compost IN 12 LITRE BAGS ONLY £3.68 for 12 litres 31p 75% 5star_red.gif 4star_red.gif 76%
Verve Grow Your Own Grow Bag £1.98 for 27 litres 7p 55% 5star_red.gif 4star_red.gif 74%
Westland Gro-Sure Seed & Cutting Compost £4.99 for 30 litres 17p 80% 4star_red.gif 4star_red.gif 73%
Verve Sowing & Cutting Compost IN 50 LITRE BAGS ONLY £5.98 for 50 litres 12p 40% 5star_red.gif 3star_red.gif 71%
  Verve Multipurpose Compost £2.98 for 20 litres 15p 58% 3star.gif 5star.gif 61%
  J Arthur Bower's John Innes Seed Compost £3.99 for 20 litres 20p 50% 4star.gif 3star.gif 60%
  Westland John Innes No. 1 Young Plant Compost £4.99 for 30 litres 17p 65% 3star.gif 4star.gif 56%
  Verve John Innes Seed Sowing Compost £4.98 for 20 litres 25p 50% 2star.gif 4star.gif 54%
  Westland Jack's Magic All-Purpose Compost £4.99 for 30 litres 17p 95% 3star.gif 3star.gif 50%
  J Arthur Bower's Seed & Cutting Compost £3.99 for 20 litres 20p 70% 4star.gif 1star.gif 46%
  J Arthur Bower's John Innes No. 1 Compost £3.99 for 20 litres 20p 50% 2star.gif 2star.gif 34%
  Verve John Innes No. 2 Potting-on Compost £4.98 for 20 litres 25p 50% N/A² 1star.gif 8%
Peat-free composts
  Miracle-Gro Expand 'n Gro Enriched Compost £9.99 for 50 litres 20p 0% 1star.gif 4star.gif 40%
  GroChar Seed Compost from Carbon Gold £4.99 for 8 litres 62p 0% 2star.gif 2star.gif 29%

Using the table: The more stars the better. Best Buys are highlighted in red. Test score ignores price and is based on how well antirrhinum and cabbage seed germinated 50% (giving equal weighting to percentage germination, seedling size and quality) and how well chilli seedlings and petunia plugs developed 50% (weighting plant size, quality and leaf colour equally).

¹Based on the 2014 suggested selling price for a 20-litre bag or the nearest size to that sold.

²We did not test this compost for seed-raising as it is not sold for this purpose

Compost for plants in patio pots and hanging baskets

We tested 13 brand-leading composts - including a leading growing bag. We used them to grow begonia (geraniums) and potatoes in patio pots. This table shows how well our plants did in the composts that are still available to buy in 2014. Six of the brands that we tested have been reformulated for 2014.

Compost for containers
Best Buy Brand Price¹ Cost per litre Peat content Potato crop Begonia vigour & flowering Test score
Peat-based composts
Verve Grow Your Own Growing Bag £1.98 for 27 litres 7p 55% 5star_red.gif 3star_red.gif 77%
Westland Jack's Magic All-Purpose Compost £6.99 for 60 litres 12p 95% 4star_red.gif 4star_red.gif 71%
  Verve Tub & Basket Compost £5.48 for 50 litres 11p 58% 5star.gif 3star.gif 69%
  J Arthur Bower's Traditional All Purpose Compost £5.99 for 56 litres 11p 100% 4star.gif 3star.gif 68%
  Verve Multipurpose Compost £4.98 for 60 litres 8p 58% 5star.gif 2star.gif 60%
Peat-free composts
  Vital Earth Tub & Basket Compost £5.99 for 60 litres 10p 0% 5star.gif 3star.gif 69%

Using the table: The more stars the better. Best Buys are highlighted in red. Test score ignores price and is based on potato yield (25%), potato quality (25%), begonia vigour (25%) and begonia flowering (25%). Price is based on the 2014 suggested selling price for a 50-litre bag or the nearest size to this sold

The following composts were reformulated since our tests and are excluded from our table.

  • Homebase Multipurpose
  • J Arthur Bower’s Multipurpose
  • J Arthur Bower’s Multipurpose with added John Innes
  • Miracle-Gro Peat Free All-purpose Enriched
  • Richard Jackson’s Premium Multipurpose
  • Vital Earth RSPB Multipurpose
  • Westland Multipurpose Compost with added John Innes 
Edited by distracted
13 people like this

Share this post


Link to post

Nice post, distracted. That JAB All purpose really is good shit. And at 11p alitre you cant go wrong. Its the only non-canna specific soil id use.

1 person likes this

Share this post


Link to post

Nice post, distracted. That JAB All purpose really is good shit. And at 11p alitre you cant go wrong. Its the only non-canna specific soil id use.

I just copied what OT1 does every year!

Sick of all these twigs and bits of plastic being sold as compost though

6 people like this

Share this post


Link to post
Guest
This topic is now closed to further replies.
Sign in to follow this  
Followers 0