

🌱 Unlock your garden’s secret weapon—grow smarter, faster, stronger!
Humboldts Secret Golden Tree Liquid Plant Food is a concentrated, all-in-one nutrient formula designed to enhance plant growth indoors and outdoors. Packed with kelp, carbohydrates, and essential minerals, it supports stronger roots, stems, and vibrant foliage across vegetables, flowers, fruits, and lawns. Just 16 ounces can treat up to 224 gallons, delivering rapid, visible results in as little as 3 days. Trusted by thousands of gardeners nationwide, it’s the ultimate growth booster for professional and hobbyist growers alike.
































| Best Sellers Rank | #29,851 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #793 in Garden Fertilizers |
| Brand | Humboldts Secret |
| Customer Reviews | 4.5 out of 5 stars 4,523 Reviews |
| Global Trade Identification Number | 00859680937492 |
| Item Form | Liquid |
| Item Weight | 16 Ounces |
| Liquid Volume | 16 Fluid Ounces |
| Specific Uses For Product | Hydroponics,Plant Food |
L**T
Not bad! Using it on my flower garden
Not bad! Using it on my flower garden. The annuals....impatien, petunia, viola showed faster growth and more vibrant colors in 3 days after applying 1/2 teaspoon per gallon. Careful on the marigold though. They burned with the same mix, but coming back strong on day 6. Will mix 1/4 teaspoon per gallon on those for the next feeding. The perrenials...columbine, lavender, snap dragon, begonia, lithodora, allysum, asian lily and geranium took about 5 days to show very minor improvement. None burned with the 1/2 teaspoon mix but will go with 1/4 teaspoon mix for next feeding on those to just play it safe. Tested on one of 6 different variety's of hybrid tea bare root roses that have been in the ground since early February and this thing has exploded in the best way in 5 days. WOW! It was the weakest looking of the 6 and it is now overtaking the others. Will stick with the 1/2 teaspoon mix on the bare root roses until after I see how a mature, full sized rose bush reacts to my feeding it this morning the full teaspoon mix. My 3 tomatoes, a yellow heirloom cherry, San Marzano heirloom and sweet red cherry liked the 1/2 teaspoon mix 6 days ago and growing faster, fuller since. Strawberry's not good with my test of a 1/2 teasppon mix on 1 of 4. It burned within a day and a half and is now dead in 3 days. No Golden Tree on my strawberry's until I get some feedback. Bummer! My cantaloupe took off within 3 days of a 1/2 teaspoon mix on it and will be applying same on a jalapeno, bell pepper, mint and chive for thier first feeding's tomorrow. All in all...I'm very happy. I like the organic factor and the results have been noticeably remarkable, strawberry aside. Now' if Humboldt figured out a way to put some ingredient in there to defeat the gohers?....I'd have the best of both worlds.
J**T
Excellent addition to my fertilizing program!
I will start off by saying I bought a 2 ounce of this plant food over a year ago and stashed it to use in my garden this year. Well, not only did it keep extremely well it also is a miracle for my garden! For the first month of my garden, I used my previous fertilization program but didn't see much growth in my plants. The beginning of the second month I decided I was going to use this plant food in addition to my fertilizer plan. It has amazing results! Not only do I use it on my tomato plants, my peppers, cucumbers, watermelon, cantaloupe, lettuce and strawberries, it also works wonders on all the rest of my plants including my fresh herb garden and flowering plants! My garden and yard have so much color now it's unbelievable, and by taking pictures every week of my garden's progress the difference is astounding. Recently my cantaloupe and cucumber plants ended up being a target for rabbits, but even with doses of this stuff every two weeks these plants have made a remarkable recovery! Because of the expanse of all my plants, I just placed my next order for this amazing fertilizer and can't wait to continue using it! Also: my fertilizer is a mix of kelp, fish, and myco tea in addition to use of Golden Tree. I also regularly place a mix of compost on the soil for additional nutrients, support and moisture control which is a blend of grass clipping, coffee grinds and fresh mulch.
L**N
Was suspicious at first, but it really is amazing.
I refer to this as "that snake oil I got from Amazon" to my bf--jokingly of course. But when I bought it I wasn't sure if the reviews were just posts from people who had been encouraged to review the product, as all my google searches for reviews talked about the company giving out free product in exchange for reviews. That aside, this stuff is GREAT. I'm not the best gardener, but it isn't for lack of trying. I think my balcony just isn't the best place to try to grow any plants. It gets direct sun a few hours a day, then filtered sun the rest of the time (south facing). I'll give the two examples that rocked my world about this stuff. I have a really $$ David Austin Rose that never bloomed at ALL. I think I might've squeezed ONE bloom out the entirety of last year. I also had a honeywort plant that had been in a pot for literal months (probably 2-3) and had never grown beyond it's two original leaves. I It was basically lying on the ground and simply refusing to die. I'd given all my plants many helpings of Fox Farms Big Bloom, and it seemed to perk up my other plants a bit, it did nothing for these guys. Fast forward to getting this stuff, I applied as directed (I actually erred on the side of using less because I was going out of town and afraid everything would die.) went on vacation (with a drip irrigator installed) and came home a week later and it was miraculous! The honeywort had grown 5 sets of leaves. FIVE! and started going upright (I thought it had damping off or whatever and was totally going to die, but it didn't!) and my fancy rosebush had 4 blooms! After having none, despite giving it alfalfa meal (although that helped it grow some leaves). So, for my purposes, this stuff is the best. I'd used the Jobe's rose stakes before, and had to dig them up. I think it darn near killed one of my rosebushes. I'm probably not going to use this as often as recommended, because honestly I'm afraid of overdoing it, but I've tried lots of things and have never had this result. Bigtime fan.
L**U
Glad I discovered a great product!!!
Full disclosure: I received a promotional offer for my review. I rely on honest opinions and reviews, in order to make an informed decision as to the suitability of a product before I make a purchase. In turn i like to share my product experiences with others. Here in New England we had a rather long winter season, and as a result, the roads were overdosed in salt and other ice melting chemicals. This resulted in my front yard receiving a rather unhealthy amount of salt, thereby causing my ornamental plants to suffer with late budding. I tried to flush the affected areas with R/O water to loosen up and drain away any contaminates. Afterwards, i came across Golden tree in my searches for sick plant nutrients and soon began digesting all that I could learn from the manufactures claims as well as all of the public comments. The claims seemed to be miraculous, so I decided to order a bottle and wait the 2 additional days to give my trees a healthy nutrient feeding. Upon receiving my bottle I carefully read the instructions, as it was stated that Golden tree is highly concentrated and replaces many other types of plant supplements. I carefully measured out 5ml for 1 gallon of water and added 5ml of Dyna grow Folliage pro for each tree. My trees began to respond rather well to this Golden Tree, both in terms of budding and new grow to flowering. The trees that I have are French Lilac, Clematis (Jack Manny), and Dogwood (Cherokee Princess) As of the time of this review my trees will be on their third feeding, and they have done remarkably well. I will be ordering more of this product in the future and I would highly recommend Golden tree to my friends and family. One last note: I will up my review from 4 stars to 5 once i have had an opportunity to test Golden tree in a hydroponic setting, I would love the chance to do a side by side comparison to see any and all benefits. But for now, this product is pretty dam good, it saved alot of invested time and money in my ornamental trees and that means alot to me.
T**A
Smell like sewage, works like magic
This product has a very powerful sewage smell - use gloves and open it in a ventilated space. You probably won't want to use it in any area that can transfer air to the rest of your house. I tried out the base A+B nutrients in my hydroponic garden. They work well when you add CalMag, but the base product suggested to use this along with the base nutrients, so I decided to try it out. The smell hit me the second I removed the cap, and got nauseatingly worse once I punctured the foil seal. The smell lingered for several hours in to area I opened it in. The product also made my hydroponic basin smell like sewage for a couple of days. The smell goes away once the plants have absorbed to product. I only added it to one basin in case it had negative effects on my plants. The plants I used it on have had their growth turbocharged - they are visibly catching up to plants that are a couple of weeks older.
J**Z
Hugely successful grows with Humboldt's Secret
I use the whole Humboldt's Secret nutrient line on plants grown indoors in tents with automated lighting, circulation and exhaust fans and manual feeding, watering, temperature and humidity controls. My flowers are cup quality, every time. Top quality nutrients, broad spectrum, easy schedule and dosing and super reasonable compared to other brands with comparable offerings. On average, I'd say my return on investment in yield:nutrient is about 50:1. Hard to argue that. I'm a believer.
C**W
Amazing additive!
It’s very potent smelling and dark, helps throughout every stage of the plant. Shipped super fast
S**N
It's like magic, real magic that you must be careful with!
This stuff is amazing! I don't know what they put in it and everyone claims it's not molasses, but I swear you can almost tell from one feeding and definitely by two that this is a got to have all day long. For your medicinal to anything you have in the garden unlike many other high yeild bloom boosters all in 1s. The only cons are it's way to thick to ever get a correct ml it's super concentrated to the point of eye drop dilution. The other is the speed in which it metabolizes the flowering process. It's almost a little too fast or again the way in which it's concentrated makes it so using to much can start to mature you're flowers overriding the full potential of the size from what I can tell. A pro, it feeds your babies from the bottom to the top. One I've the several things I began to notice after a few feedings was the increase in the bottom flowers growth and hairs even though the are getting the same amount of pars. I mean just exploded. So a lot of the Lolly pop and so on methods might not be such a good idea if you put this in your feeding regime. If there is a flower site this stuff will push it all the way out. That's basically what it does trigger anything with a receptor, bud sites hairs all over branches with no bud sites, the stuff is pretty good.
Trustpilot
4 days ago
2 weeks ago