Potassium nitrate
Potassium nitrate for sale on Ireland's largest auction and classifieds sites
Growmore special blend - growmore, - £32.99
Elixir special blend • Growmore multi purpose • Plant food even - Free postage - New and Used
Elixir special blend • Growmore multi purpose • Plant food even - Free postage - New and Used
20ltr organic seaweed - seaweed, liquid - £49.95
Might not obvious • Choice but seaweed • Makes ideal fertiliser - Free postage - New and Used
Might not obvious • Choice but seaweed • Makes ideal fertiliser - Free postage - New and Used
Jarder month lawn feed - jarder, - £18.95
Jarder month lawn • Feed fertiliser npk • Contains industry leading - Free postage - New and Used
Jarder month lawn • Feed fertiliser npk • Contains industry leading - Free postage - New and Used
Organic 5ltr liquid seaweed - organic, - £23.95
Multi mite seaweed • Suitable all plants • You unlock power - Free postage - New and Used
Multi mite seaweed • Suitable all plants • You unlock power - Free postage - New and Used
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Elixir gardens high - high, potassium - £74.99
Bumper crop high • Potassium soluble fertiliser • Feed encourage abundant - Free postage - New and Used
Bumper crop high • Potassium soluble fertiliser • Feed encourage abundant - Free postage - New and Used
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48 listings · from £2.5 · avg £31.73
⚠️ These listings were last updated more than 95 days ago.
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Browse 48 potassium nitrate listings currently in our index. Prices range from £2.5 to £414.95, with an average of £31.73. Whether you are hunting for a bargain or looking for a top-spec model, the selection below covers all price points — new, used and refurbished. More about potassium nitrate →
Osmocote pro m - pro, 12-14 - £51.99
Osmocote pro 14m • Especially suitable autumn • Spring potting many - Free postage - New and Used
Osmocote pro 14m • Especially suitable autumn • Spring potting many - Free postage - New and Used
Calcinit - , + - £7.58
Calcinit 15.5 26.3 • Cao fully water • Soluble nitrogen calcium - Free postage - New and Used
Calcinit 15.5 26.3 • Cao fully water • Soluble nitrogen calcium - Free postage - New and Used
Bat guano fertiliser - guano, - £2.80
Bat guano outclasses • All known other • Organic fertiliser better - Free postage - New and Used
Bat guano outclasses • All known other • Organic fertiliser better - Free postage - New and Used
Shogun plant nutrients sumo - plant, - £414.95
Calmag vital many • Plant processes synthesis • Carbohydrates chlorophyll production - Free postage - New and Used
Calmag vital many • Plant processes synthesis • Carbohydrates chlorophyll production - Free postage - New and Used
Houseplant food concentrate - houseplant, - £2.76
- Free postage - New and Used
- Free postage - New and Used
Nutrigrow pre seeder - nutrigrow, & - £29.99
Pre seeder • Quality npk fertiliser • Which ideal use - Free postage - New and Used
Pre seeder • Quality npk fertiliser • Which ideal use - Free postage - New and Used
Baby bio original plant feed - original, - £6.59
Use when plants • Are actively growing • All ab31 ab56 - Free postage - New and Used
Use when plants • Are actively growing • All ab31 ab56 - Free postage - New and Used
Westland fish blood - fish, - £16.99
Westland fish blood • Bone good natural • Source all three - Free postage - New and Used
Westland fish blood • Bone good natural • Source all three - Free postage - New and Used
Bud booster with - pk, + - £69.95
One litre bottle • 1ml 2ml per • Feed from when - Free postage - New and Used
One litre bottle • 1ml 2ml per • Feed from when - Free postage - New and Used
Sulphate potash high - sulphate, of - £12.99
Weedkiller lawn weed • Killer root weeds • Extra tough concentrate - Free postage - New and Used
Weedkiller lawn weed • Killer root weeds • Extra tough concentrate - Free postage - New and Used
Jarder lawn feed - jarder, - £17.95
Jarder new lawn • Laid recently seeded • Fertiliser provides all - Free postage - New and Used
Jarder new lawn • Laid recently seeded • Fertiliser provides all - Free postage - New and Used
Ivisons 696 pre seed - ivisons, - £34.99
Ivisons pre seed • Please note bags • Under 20kg are - Free postage - New and Used
Ivisons pre seed • Please note bags • Under 20kg are - Free postage - New and Used
Nutrigrow growmore tree - growmore, tree, - £27.99
Nutrigrow growmore highly • Effective general purpose • Npk granular fertiliser - Free postage - New and Used
Nutrigrow growmore highly • Effective general purpose • Npk granular fertiliser - Free postage - New and Used
Osmocote pro slow release - slow, - £52.99
Osmocote pro5 month • High potassium slow • Release fertiliser cost - Free postage - New and Used
Osmocote pro5 month • High potassium slow • Release fertiliser cost - Free postage - New and Used
Baby bio fertiliser for - baby, - £3.12
Baby bio original • House plant food • Concentrate 175 safety - Free postage - New and Used
Baby bio original • House plant food • Concentrate 175 safety - Free postage - New and Used
Granulated fertilizer for - granulated, - £13.90
Enhance vitality your • Conifers thuja cypress • Evergreen flora our - Free postage - New and Used
Enhance vitality your • Conifers thuja cypress • Evergreen flora our - Free postage - New and Used
Osmocote slow release - osmocote, - £20.99
Many changes over • Years butone fertilizer • Ingredient always osmocote - Free postage - New and Used
Many changes over • Years butone fertilizer • Ingredient always osmocote - Free postage - New and Used
Organic 10ltr liquid seaweed - organic, - £29.95
Multi mite seaweed • Suitable all plants • You unlock power - Free postage - New and Used
Multi mite seaweed • Suitable all plants • You unlock power - Free postage - New and Used
Baby bio houseplant food - baby, - £2.50
Baby bio houseplant • Food 175ml fertiliser • Growing vibrant healthy - Free postage - New and Used
Baby bio houseplant • Food 175ml fertiliser • Growing vibrant healthy - Free postage - New and Used
Canna coco nutrient - coco, a+b - £59.20
Add canna coco • Nutrient reservoir dilution • Ratio 250 per - Free postage - New and Used
Add canna coco • Nutrient reservoir dilution • Ratio 250 per - Free postage - New and Used
Large indoor plant food - large, - £5.49
Large fertiliser sticks • Larger indoor plants • Jobe distributed devonia - Free postage - New and Used
Large fertiliser sticks • Larger indoor plants • Jobe distributed devonia - Free postage - New and Used
Osmocote slow release - slow, - £5.69
Osmocote exact high • One fertiliser ingredient • Needs nutrient release - Free postage - New and Used
Osmocote exact high • One fertiliser ingredient • Needs nutrient release - Free postage - New and Used
Canna coco b plant - +, - £15.85
After years research • Into potting mixes • Drainage leaf analysis - Free postage - New and Used
After years research • Into potting mixes • Drainage leaf analysis - Free postage - New and Used
Jarder lawn feed fertiliser - lawn, - £26.95
Jarder ultimate lawn • Feed fertiliser 2.5 • Cao nutrient rich - Free postage - New and Used
Jarder ultimate lawn • Feed fertiliser 2.5 • Cao nutrient rich - Free postage - New and Used
5ltr organic seaweed liquid - 5ltr, - £23.95
Might not obvious • Choice but seaweed • Makes ideal fertiliser - Free postage - New and Used
Might not obvious • Choice but seaweed • Makes ideal fertiliser - Free postage - New and Used
Venus flytrap plant food - flytrap, - £14.99
Your carnivorous plants • You longer need • Live food simply - Free postage - New and Used
Your carnivorous plants • You longer need • Live food simply - Free postage - New and Used
Autumn fertilizer for lawns - for, - £13.60
Granular phosphorus potassium • Fertilizer intended autumn • Primarily used prepare - Free postage - New and Used
Granular phosphorus potassium • Fertilizer intended autumn • Primarily used prepare - Free postage - New and Used
30l premium liquid seaweed - liquid, - £66.99
Organic seaweed fertiliser • Extract natural plant • Food liquid kelp - Free postage - New and Used
Organic seaweed fertiliser • Extract natural plant • Food liquid kelp - Free postage - New and Used
Premium liquid seaweed - liquid, - £21.99
Organic seaweed fertiliser • Extract premium kelp • Feed natural plant - Free postage - New and Used
Organic seaweed fertiliser • Extract premium kelp • Feed natural plant - Free postage - New and Used
Vitax blood fish bone plant - fish, - £9.99
Made from natural • Ingredients this fertiliser • Rich nitrogen phosphorus - Free postage - New and Used
Made from natural • Ingredients this fertiliser • Rich nitrogen phosphorus - Free postage - New and Used
Ivisons lawn grass - ivisons, pre - £34.99
Family run company • Growing you free • Next day delivery - Free postage - New and Used
Family run company • Growing you free • Next day delivery - Free postage - New and Used
Granulated fertilizer for - granulated, - £13.60
Usually when planting • Enrich substrate acid • Peat soil coniferous - Free postage - New and Used
Usually when planting • Enrich substrate acid • Peat soil coniferous - Free postage - New and Used
Baby bio houseplant food - baby, - £3.43
Baby bio houseplant • Food 175ml fertiliser • Growing vibrant healthy - Free postage - New and Used
Baby bio houseplant • Food 175ml fertiliser • Growing vibrant healthy - Free postage - New and Used
Rock resinator heavy - heavy, yields - £62.95
Resinator revolutionary flower • Enhancer that will • Dramatically increase essential - Free postage - New and Used
Resinator revolutionary flower • Enhancer that will • Dramatically increase essential - Free postage - New and Used
Granulated fertilizer for - granulated, - £14.01
Granulated fertilizer agrecol • Specifically conifers thuja • Cypress providing essential - Free postage - New and Used
Granulated fertilizer agrecol • Specifically conifers thuja • Cypress providing essential - Free postage - New and Used
Dried blood meal organic - dried, - £2.50
Contains about 13.25 • Nitrogen content 1.0 • Phosphorous 0.6 potassium - Free postage - New and Used
Contains about 13.25 • Nitrogen content 1.0 • Phosphorous 0.6 potassium - Free postage - New and Used
Growth technology chilli focus - growth, - £6.99
Chilli pepper focus • Expertly formulated optimum • Growth chillies peppers - Free postage - New and Used
Chilli pepper focus • Expertly formulated optimum • Growth chillies peppers - Free postage - New and Used
Osmocote slow release plant - osmocote, - £20.29
Osmocote exact high • One fertiliser ingredient • 14m professional ontrolled - Free postage - New and Used
Osmocote exact high • One fertiliser ingredient • 14m professional ontrolled - Free postage - New and Used
Canna 250 pk13 250ml - pk, pk13/14 - £7.99
You want biggest • Fruits flowers canna • Mixture top quality - Free postage - New and Used
You want biggest • Fruits flowers canna • Mixture top quality - Free postage - New and Used
Doff growmore plant feed multi - plant, - £5.50
Doff growmore multi • Purpose plant food • Fertiliser balanced npk - Free postage - New and Used
Doff growmore multi • Purpose plant food • Fertiliser balanced npk - Free postage - New and Used
Growmore fertiliser 07 - fertiliser, 07-07-07 - £2.50
Growmore balanced all • One feed rich • Essential nutrients enhance - Free postage - New and Used
Growmore balanced all • One feed rich • Essential nutrients enhance - Free postage - New and Used
Organic 20ltr liquid seaweed - organic, - £49.95
Multi mite seaweed • Suitable all plants • You unlock power - Free postage - New and Used
Multi mite seaweed • Suitable all plants • You unlock power - Free postage - New and Used
Organic seaweed liquid - organic, - £11.95
Might not obvious • Choice but seaweed • Makes ideal fertiliser - Free postage - New and Used
Might not obvious • Choice but seaweed • Makes ideal fertiliser - Free postage - New and Used
Try this: large garden storage box | tall planter plastic | plant cells | wooden garden planters trellis | wooden garden trellis arch | plant obelisk | plastic garden tray | small oak barrel | square plastic plant pots | plastic planters trough
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Everything you need to know about potassium nitrate
Whether you are looking for a brand-new or second-hand potassium nitrate, eBay offers one of the largest selections available online. With 48 active listings at the time of this page's last update, you have plenty of choice across different conditions, sellers and price points. The cheapest option currently starts at £2.5, while premium listings can reach £414.95 — giving you a wide budget spread to work with. The average price of £31.73 can serve as a useful benchmark: listings below this tend to be used or auction-style, while those above often include extra accessories, warranties, or are sold by professional sellers with high feedback scores. Always check the seller's feedback rating and return policy before committing to a purchase. If you need the item quickly, filter by "Buy It Now" to avoid the uncertainty of auctions. For used items, look closely at the condition description and photos — terms like "good", "very good" and "like new" can mean very different things depending on the seller.