

🌿 Elevate your garden’s bloom game — don’t just grow, thrive!
General Hydroponics Liquid Kool Bloom is a premium 1-quart liquid fertilizer designed to enhance flowering and fruiting in hydroponic plants. Enriched with stress-reducing vitamins and nutrient-transporting acids, it promotes abundant blooms, richer essential oils, and improved ripening. Ideal for use at the start of the reproductive cycle, it supports larger, heavier flowers and fruits, making it a favorite among serious growers seeking vibrant, high-quality yields.

| Best Sellers Rank | #10,609 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #299 in Garden Fertilizers |
| Brand | General Hydroponics |
| Customer Reviews | 4.7 out of 5 stars 2,153 Reviews |
| Item Form | Liquid |
| Item Weight | 2.7 Pounds |
| Liquid Volume | 32 Fluid Ounces |
| Manufacturer | General Hydroponics |
| Specific Uses For Product | Hydroponics |
D**S
takes forever to start blooming
I am glad I bought this when I did. The instructions on GH website call for 2 tsp per five gallons during week 7 of bloom but week 7 can be done over for a longer season. This product turned my growing season around, besides having trouble setting flowers on my peppers when it's 95 out in July, the plants responded well to a lower nitrogen and higher Potassium and Phosphate feeding program. The other products from General Hydroponics are also for sale on Amazon like, floranova and floralicious plus, both I deemed necessary. This really turned around my growing season, before I used orchid blooming fertilizer, like 0-54-32 and got lots of flowers but this stuff worked just as well and makes my plants really hardy. The price is offsetting because I bought the whole blooming season line but hopefully the experts at GH will follow through. I have noticed though that the directions on the bottle aren't accurate if your going to be using other fertilizers with this, like the base nutrients, and need to check on the proper amount to harmonize. I got the drain-to-waste (soil) chart off the general hydroponics website and started at week 7. This stuff doesn't seem strong enough though when the plants need to root or bloom, this kind is low on the scale of fertilizers compared to ordering directly the main ingredient, monopotassium phosphate. Compared, plants fed early after transplants (like in february I fed a chocolate ghost pepper monopotassium phosphate) the plants fed the high numbered fertilizer are doing much better. So the strengths of the last two numbers on this are a little low and like buying enough of this to feed 100 pepper plants is outrageous and using a more cost effective program would be better. This didn't exactly turn around the flowering process like monopotassium phosphate (similar to dry koolbloom) because it's just not strong enough. The stuff wouldn't kick in fast enough when I need to get flowers the process takes a while. The change in mesuring nutrients was difficult too because there is now 8 different bottles (floranova,floranectar..) between fertilizer feedings.
I**Z
Good quality
Exactly what I was expecting
M**D
Does what it is supposed to do!
Has helped my garden in many ways!
J**S
Kool bloom "WORK'S"
As a major participater in Kool bloom products I highly recommend Kool bloom liquid as well as cool bloom dry. They both are cost profitable!! And using both in tandem make for some of the best flowering and and heavy yields! "Hands down" easy too use and quick performance.
A**O
I use the whole line
Works good
J**E
Great product for hydroponics
Really helped plant growth, the bottle came with a nice seal with a double ring making it easy to use with a syringe. I expect the quart bottle to last me a long time making it a great value for the money!
G**S
General hydroponics is the best
General hydroponics nutrients line has been the best line i have used to date. Koolbloom if used correctly amd about half strength up u til last 2 weeks before flush. It has been the best flower booster I have used. Ther new floraduo a and b bottle is an amazing product as well super clean plants love it. Happy growing to all.
M**E
Does it’s job…
Just started using it and it’s been great .. thick.. dense.. and smells amazing.. will continue to use for sure.. pix tell it all .. u be the judge…
Trustpilot
3 days ago
2 weeks ago