






🌸 Feed your flowers like a pro—watch your garden steal the spotlight!
Jack's Classic 10-30-20 Blossom Booster is a 10lb water-soluble fertilizer powder designed to dramatically increase the color and quantity of blooms in flowering plants. Featuring a balanced NPK ratio and essential micronutrients, it supports optimal plant health and growth. Its versatile application methods and included measuring spoon make it easy to use, while the concentrated powder formula offers excellent value by producing multiple gallons of liquid fertilizer.










| Best Sellers Rank | #8,234 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #285 in Garden Fertilizers |
| Customer Reviews | 4.7 out of 5 stars 5,451 Reviews |
C**N
It does exactly what they say! Boom! Flowers!
This fertilizer is like magic on flowers and vegetable gardens. I mixed some up and applied to everything growing in my gardens, both flowers and vegetables. I swear the next day it was like magic! My tomatoes had buds, my butternut squash plants looked happy and almost an inch taller. The flowers, wow. Everything perked up and within just a few days things were starting to bloom, I mean BLOOM! Every plant benefited greatly from this fertilizer. I just ordered more
T**Y
Great results
Love this stuff, my plants did too! Just wish is wasn’t so costly, so I use in between other feedings to help last longer.
D**E
Want more flowers?
Use this every 7-10 days. It takes 1 tablespoon per gallon of water. Perfect to use on your annual flowers to increase blooms and size of buds. It also helps the flowers to last longer. Once you grow your flowers using Jack’s 20-20-20 then hit them with this blossom booster and you will love the results. Works for all indoor and outdoor flowering plants as well as fruits and vegetables. You and your plants are gonna love this stuff.
L**N
MAGIC POWDER!!
I have always killed every single plant I buy in the summer every year! I can’t keep anything alive let alone have flowers! Well everything changed when I bought Jacks Blossom Booster! This stuff has taken me from dead flowers to new blooms and beautiful flowers everywhere! The beautiful hanging petunias I buy every year and kill every year are now bursting with flowers after only one use!! It comes in a powder form with a little scooper. Just measure the amount of water needed, scoop the powder and add to the water. I like to let it sit and dissolve in the water for a few minutes and stir it around to make sure the product doesn’t get wasted. Tip: When watering with the fertilizer add little amount to the soil at a time or else all the fertilizer water will go through at once and get wasted! Little slow amounts to let the plant absorb it all the way is key! Overall I will definitely be buying more of Jacks fertilizer in the future to help my flowers and my garden bloom all summer long!
H**M
Molybdenum (Copper)
Jacks are all great products and flowering plants love it by showing off their colors. However, I purchased Jacks Petunia FeEd and while looking at the directions I noticed it states that it's toxic to Ruminate Animals. Anytime I see toxic, alarms go off. Due to my ignorance I didn't know what Ruminate animals were. Basically foragers of plants like goats, cows, deer, etc. Here's an excerpt; "Ruminant species are most frequently affected, and clinical signs may include poor growth, infertility, diarrhea, lameness, ataxia, as well as osteoporosis. Copper supplementation to address the mineral imbalance is the most effective treatment." My question is and still researching is, although its water soluble can I reuse that same soil I fertilized with Jacks for next year for a garden without contaminating the vegetables and fruit? I know it's not organic but I don't want to contaminate any soil and harm animals in the process. SMH, the things we do to ourselves and environment. Now we're all the wiser so each of us can decide.
G**N
Beautiful Bloom Color with Jack's Fertilizer
I use Jack's Bloom Fertilizer one weekly on Crepe Myrtles, Christmas Cactus, Red Buckeye and Sunpatience flowers with absolutely great results. The extra minerals give breath taking bloom color as well as increased bloom frequency. One scoop in a gallon of water once weekly does the job ! Jack's does far better than many other "bloom boosters" I have tried through the years. I am very pleased with this product
C**8
Nice item
Works great help my flowers bloom
J**J
Beautiful blooms
This product made my flowers bloom more than any other I’ve tried. My Mandevilla required using it twice a week for a couple weeks to keep it blooming well. I will definitely purchase it again.
Trustpilot
1 month ago
3 weeks ago