# Best Bonsai Fertilizers Source: https://bonsainest.com/best/best-bonsai-fertilizers Updated: 2026-09-14 Publisher: Bonsai Nest. Our score is an editorial rating out of 10 (fit 35%, features 25%, build 20%, value 20%), not a customer rating. Method: https://bonsainest.com/how-we-research#our-score Bonsai grow in very little soil, and most bonsai mixes hold few nutrients on their own. Feeding is not an extra, it is how the tree gets what open ground would normally supply. Products vary in their nutrient ratio, in whether they release slowly or dissolve at once, and in how they behave in free-draining substrate. Timing varies too, since a tree in development wants more than one being refined. We weighed nutrient balance against how well each product stays put in open mix rather than washing straight through the pot. Smell, mold and whether pellets attract animals also mattered, since many trees live near a back door. Balanced liquid feeds suit growers who want control and frequent small doses. Solid cakes and pellets suit anyone who would rather feed once and let the watering can do the rest. ## Picks ### 1. Bonsai Fertilizer Pellets by Perfect Plants - 5 Year Supply - All Natural Slow Release for All Live Bonsai Tree Types Our score: 7.8/10 (Fit for the job 8/10 · Features and specs 7/10 · Build and materials 7/10 · Value 9/10) Perfect Plants' all natural slow release bonsai fertilizer pellets, marketed as a 5 year supply for all tree types. Pros: - 5 year supply claim suggests very low yearly cost - All natural slow release feed is gentle on roots - Works across tropical and temperate bonsai species Cons: - Supply estimate depends on collection size and pot count - No NPK ratio listed for comparing nutrient balance Details: https://bonsainest.com/product/B079C3DC33 ### 2. Leaves and Soul Bonsai Fertilizer Pellets 18-6-8 Slow Release Pellets for Seedlings, Mature Plants, All Tree Types, 5.2 oz Our score: 7.8/10 (Fit for the job 8/10 · Features and specs 8/10 · Build and materials 7/10 · Value 8/10) Leaves and Soul's 18-6-8 slow release bonsai fertilizer pellets, 5.2 oz, for seedlings through mature trees. Pros: - Stated 18-6-8 ratio makes feeding strength easy to judge - High nitrogen boosts growth on developing trees - Slow release pellets reduce the risk of feeding spikes Cons: - High nitrogen is too strong for refined trees you want compact - 5.2 oz is a small amount for larger collections Details: https://bonsainest.com/product/B08QZZMP41 ### 3. Professional Liquid Bonsai Fertilizer by EZ-gro, 3:1:2 Ratio Concentrate Indoor Plant Fertilizer, 8 oz Our score: 7.8/10 (Fit for the job 8/10 · Features and specs 8/10 · Build and materials 7/10 · Value 8/10) EZ-gro's professional liquid bonsai fertilizer, an 8 oz concentrate with a 3:1:2 ratio for indoor plants. Pros: - 3:1:2 ratio is a balanced growth formula for bonsai - Concentrate goes a long way in regular waterings - Suits indoor ficus, jade and other houseplant bonsai Cons: - Balanced growth feed is not tuned for flowering species - Needs measuring each time, unlike slow release pellets Details: https://bonsainest.com/product/B0CJ19D55D ### 4. Ho Yoku Bonsai Fertilizer Pellets - Slow Release Bonsai Food That Provides Continuous Feeding During Watering, Ten Ounces Our score: 7.6/10 (Fit for the job 8/10 · Features and specs 7/10 · Build and materials 7/10 · Value 8/10) Ho Yoku's slow release bonsai fertilizer pellets, ten ounces of food that feeds continuously during watering. Pros: - Slow release pellets feed a little each time you water - Ten ounces lasts a hobby collection a long time - Pellets sit on the soil, so there is nothing to mix Cons: - Check the printed NPK ratio on the label before feeding heavily - Pellets can attract mold on constantly damp soil Details: https://bonsainest.com/product/B08ZNNHT4G ### 5. SUPERthrive Bonsai-Pro Liquid Plant Food, 8 oz Our score: 7.1/10 (Fit for the job 8/10 · Features and specs 6/10 · Build and materials 7/10 · Value 7/10) SUPERthrive's Bonsai-Pro liquid plant food in an 8 oz bottle for feeding bonsai trees. Pros: - SUPERthrive is a widely recognized plant supplement brand - Bonsai-Pro formula is marketed specifically for bonsai - 8 oz concentrate lasts through many feedings Cons: - Check the dilution ratio on the label before mixing - Premium brand pricing is higher than generic liquid feeds Details: https://bonsainest.com/product/B009277LT0 ### 6. AlgoPlus 506 250 ml Bonsai Liquid Fertilizer Our score: 7.0/10 (Fit for the job 7/10 · Features and specs 6/10 · Build and materials 7/10 · Value 8/10) AlgoPlus 506 bonsai liquid fertilizer in a 250 ml bottle, a concentrate for regular feeding. Pros: - Liquid concentrate gives fast, controllable feeding - 250 ml bottle mixes into many watering cans - Easy to adjust strength for indoor versus outdoor trees Cons: - Check the printed NPK ratio on the bottle before dosing - Liquid feed needs regular application to stay effective Details: https://bonsainest.com/product/B07WGHJ1G4 ### 7. Liquid Bonsai Fertilizer Food Supplement - Micrototal Liquid Tree Fertilizer with Trace Elements Our score: 6.3/10 (Fit for the job 7/10 · Features and specs 5/10 · Build and materials 6/10 · Value 7/10) Micrototal liquid bonsai fertilizer food supplement with trace elements for tree health. Pros: - Trace elements help correct pale leaves from micronutrient gaps - Works as a supplement alongside a main fertilizer - Liquid form absorbs quickly after watering Cons: - Check the bottle size and dilution rate on the label - Supplement alone may not supply enough main nutrients Details: https://bonsainest.com/product/B08YNJH2YT ### 8. 9GreenBox.com Release Bonsai Fertilizer Pellets Our score: 5.5/10 (Fit for the job 6/10 · Features and specs 4/10 · Build and materials 6/10 · Value 6/10) 9GreenBox's release bonsai fertilizer pellets, a basic slow-feed option often paired with gift trees. Pros: - Easy pellet format suits first-time bonsai owners - Simple top-dress feeding without measuring liquids - Pairs naturally with 9GreenBox gift bonsai Cons: - Basic pellet formula gives no room to adjust the feeding strength - Vague listing makes value comparison difficult Details: https://bonsainest.com/product/B001CZ9R1A As an Amazon Associate I earn from qualifying purchases.