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Jack's Classic

Jack's Classic 15-30-15 Houseplant Special Water-Soluble Fertilizer with Micronutrients to Green-Up and Increase Blooms in Houseplants, 8oz

  • Based on 793 reviews
Condition: New
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This item is eligible for return within 30 days of receipt

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Availability: In Stock.
Fulfilled by Esbenshades Garden Center
Arrives Aug 5 – Aug 9
Order within 8 hours and 51 minutes
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Features

  • Many Ways to Feed - Houseplant Special can be used as a foliar or root feeding product. Great for spraying directly onto leaves, roots, or when used in a continuous feed system.
  • Water-Soluble Powder Powdered concentrates go further than liquid fertilizers. Simply mix your measured powder with water and you are ready to feed with multiple gallons of liquid fertilizer!
  • Included Measuring Spoon All Jacks Classic fertilizers come with a convenient spoon to create the right amount of liquid fertilizer for your plants.
  • Micronutrients - Added micronutrients supply your plant with the nutrition it needs for optimal growth and health. Unlike other fertilizers, additional feeding is not required.

Description

Releases nutrients gradually for up to 4 months of vigorous growth. Blended with an enhanced micronutrient package which provides optimal nutrition for strong roots and green foliage. Features the highest safety factor to prevent burning when applied as directed. Free measuring spoon enclosed for easy and precise application.

Brand: Jack's Classic


Item Weight: 8 Ounces


Item Form: Powder


Liquid Volume: 0.24 Liters


Specific Uses For Product: Houseplant Care, Foliar Feeding, Root Feeding, Plant Growth, Flowering Plant Support


Brand Name: Jack's Classic


Model Number: 51508


Global Trade Identification Number: 81


Manufacturer: JR Peters


Number of Items: 1


UPC: 671341515081


Unit Count: 1.0 Count


Part Number: 51508


Included Components: only product


Item Weight: 8 Ounces


Liquid Volume: 0.24 Liters


Item Form: Powder


Specific Uses For Product: Houseplant Care, Foliar Feeding, Root Feeding, Plant Growth, Flowering Plant Support


Coverage: Medium


Target Species: Plant


Mixing Ratio: 1 teaspoon per gallon of water


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Aug 5 – Aug 9

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Awesome plant food
Tried and true plant food!
Reviewed in the United States on March 20, 2026 by hhgriggs
    • 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!!! ... show more
Reviewed in the United States on October 2, 2025 by Judy Hanks
    • Jack’s keeps my plants happy and growing Jack’s keeps my plants happy and growing
Review Image by Caroline
Review Image by Caroline
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. ... show more
Reviewed in the United States on August 17, 2024 Reviewed in the United States on August 17, 2024 by Caroline
    • 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.
Reviewed in the United States on March 12, 2026 by Mary
    • Good stuff for plants
Jack’s plant products are well made. I use both the Orchid and Blossom Booster as well. My huge rubber tree needed some fertilizer and it was suggested that I try Jack’s houseplant food. Easy to mix. A bit pricey for the small container but if it keeps my indoor plants healthy it’s worth it!
Reviewed in the United States on July 18, 2025 by Donna Harrison
    • 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! ... show more
Reviewed in the United States on August 16, 2020 by Hope
    • 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.
Reviewed in the United States on December 12, 2025 by Amazon Customer
    • Would purchase again
My plants love this food. It makes them grow quickly.
Reviewed in the United States on July 19, 2025 by cathy hutton

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