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Jack's Classic 15-30-15 Houseplant Special is a water-soluble powder fertilizer designed to promote vigorous growth and vibrant blooms in houseplants. Featuring a balanced nutrient profile with added micronutrients, it supports strong roots and lush foliage. The included measuring spoon ensures precise mixing, while its versatile application methods—foliar or root feeding—offer convenience and efficiency. With gradual nutrient release lasting up to 4 months, this 8oz concentrate delivers exceptional value and consistent plant health.
| ASIN | B00KSMQM0M |
| Application Method | Spray, Mix with water |
| Best Sellers Rank | #31,135 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #905 in Garden Fertilizers |
| Brand | Jack's Classic |
| Brand Name | Jack's Classic |
| Coverage | Medium |
| Customer Reviews | 4.7 out of 5 stars 812 Reviews |
| Global Trade Identification Number | 00671341515081 |
| Included Components | only product |
| Item Form | Powder |
| Item Weight | 8 ounces |
| Liquid Volume | 0.24 liters |
| Manufacturer | JR Peters |
| Mixing Ratio | 1 teaspoon per gallon of water |
| Model Number | 51508 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Part Number | 51508 |
| Specific Uses For Product | Houseplant Care, Foliar Feeding, Root Feeding, Plant Growth, Flowering Plant Support |
| Target Species | Plant |
| UPC | 671341515081 |
| Unit Count | 1 Count |
C**E
Jack’s keeps my plants happy and growing
I’ve tried other fertilizers for my houseplants in the past but always come back to Jack’s. In the summer I use it every watering indoors and every other for the ones that sit outside for the summer. I use 2 gal jugs and cans and add one tablespoon each. I pull back to once a month or so in the cold months. You get a ton and it goes a long way. Great value. My plants grow so much with Jack’s. Sometimes I run out and don’t rush to replenish. I am always surprised when I start back using it and see the difference. I don’t usually have issues with burns, but I am as careful as I can be to avoid getting it on the leaves, especially if they’re in sunlight while watering.
A**R
Very healthy plant food
I’ve been using this houseplant fertilizer for a couple of months now and my plants look amazing. I really like this food and respond very well.
J**S
Great fertilizer!
I have been using a blue fertilizer for many years and then I couldn't find it anymore. I don't think this is the same brand but it works just as well. I put about a quarter of a teaspoon in my water and water with the fertilizer every other watering. My plants are beautiful! It also comes with a little measuring cup and chart which is very useful. So glad I found this!!!
M**E
Want massive plants? BUY THIS
If you want pothos to grow out of control, USE THIS! My plants LOVE this and they are massive!
H**S
Awesome plant food
Tried and true plant food!
H**E
Seems to
So this item I believe is a bit hard to write a review for simply because, how do u know it would go without using this , SO I am comparing past summers with my outdoor baskets. I can say that I use this every time I water my indoor and outdoor plants this past summer. I can say that so far we have had a hotter than normal summer BUT my baskets seem to be thriving. This stuff DOES smell pretty strong in the container lol forewarned but I suppose that’s to be expected with any fertilizer that should be working!
M**Y
My Plants Love It
This is my go-to for my houseplants. It's more expensive than some but my plants love it. It was recommended by the garden enter I go to.
J**S
Best Houseplant Fertilizer
Bought this houseplant fertilizer for 8 years. I have 80 plants. Highly recommend
Trustpilot
1 month ago
2 weeks ago