Slow-release fertilisers
Blooming all summer
Which? experts put 15 slow-release fertilisers to the test to find the five Best Buys, whether you prefer clusters or granules. Plus, get the best from your containers with our growing guide.
In our full report you can see...
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Best Buys
Five Best Buy fertilisers to keep plants thriving all summer.
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Compare fertilisers
Use our results table to see which slow-release fertilisers performed best in our test.
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How we test
Slow-release fertilisers' claims put to the test in our rigorous trial.
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