Sorry - we have had to temporarily suspend accepting new orders both online and by phone. We are experiencing unprecedented demand, and to maintain our high levels of customer service we need time to catch up processing existing orders. We are working 24 hours a day, 7 days a week to catch up and hope that our site and order line will be open again in the next few days.

Organic Onion Fertiliser


74% (3 Reviews)

Specially formulated with higher levels of potassium and added magnesium

Helps to improve soil structure

Supplied in pellet form for easy application


Out of Stock

Want to get notified when back in stock?


You May Also Like

Onion Set & Small Bulb Planter

7 Reviews


Garden Gear Claw Gloves

10 Reviews



Grow top quality onions, shallots and garlic the natural way with our organic Onion fertiliser.

Specially formulated with higher levels of potassium and added magnesium to ensure your crops produce firm, well ripened bulbs with good storage potential.

Besides providing nutrients, organic fertilisers also improve soil structure as they break down (when used continuously). Water and nutrients are retained in the soil for longer, and activity from beneficial soil organisms is enhanced.

Supplied in pellet form for easy application, and slow release of nutrients throughout the growing season.

(N:P:K – 6:8:15 + 2Mg0)

3kg is enough for 150 planting sets of onions or shallots. Spread at 120g per square metre and mix well into the rootzone.

1 x 3kg onion fertiliser (14168)

Perfect for growing top quality onions, shallots and garlic
How to Grow
Provides nutrients and helps to improve soil structure
More Info
Supplied in pellet form for easy application

Seeds and garden supplies will normally be delivered within the time period stated against each product as detailed above. Plants, bulbs, corms, tubers, shrubs, trees, potatoes, etc. are delivered at the appropriate time for planting or potting on. Delivery times will be stated on the product page above, or in your order acknowledgement page and email.

Orders for packets of seed incur a delivery charge of £1.95.

Orders which include any other products will incur a delivery charge of £4.95.

Where an order includes both packets of seeds and other products, a maximum delivery charge of £6.90 will apply - regardless of the number of items ordered.

Large items may incur a higher delivery charge - this will be displayed in your shopping basket.

Please see our Delivery page for further details, and more information on different charges that may apply to certain destinations.

For more information on how we send your plants please visit our Helpful Guide on plant sizes.



For the chance to be featured, share your plant pictures with us
on Instagram by using the hashtag #YourTMGarden

Join the T&M Gardener's Club

Sign up to 10% off your first order*

* New customers only


Join the T&M Gardener's ClubSign up to get 10% off your first order