Can this be used on outdoor plants?

Yes it can but it depends on the needs of your plants. They also have a blossom booster and all purpose formula that I use outside.

What’s the difference between “all purpose” and “special”?

I would think that all purpose applies to all. And special meaning that it contains superb ingredients

Is there any differences between this jr peters houseplant special 15-30-15 and jr peters all-purpose 20-20-20?

15-30-15 is double the amount of phosphorus. It’s best to check on each plant to find out what fertilizer is suitable.

Should this be refrigerated when storing in a very humid environment?

I keep mine under kitchen sink and we love in Florida👍🏻

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

15-30-15 Houseplant Special Water-Soluble Fertilizer, 8oz | Powdered, Targeted Micronutrient Package, Promotes Green-up and Increased Blooms, Transplant Solution, Root & Foliar Feeding

Product ID: 7802070

Details

Brand
Jack's Classic
Item Form
Powder
Item Weight
8 Ounces
Liquid Volume
0.24 Liters
Specific Uses For Product
Houseplant

🌿15-30-15 NPK for lush growth

💧Water-soluble powder for max absorption

🥄Included measuring spoon for precision

€ 47.71

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Croatia.

Secure transaction

Description

🌸 Feed your green space like a pro—bloom bigger, grow stronger!

PRECISION DOSING - Comes with a handy measuring spoon to ensure the perfect mix every time, eliminating guesswork and waste.
CONCENTRATED POWER - Water-soluble powder stretches your investment further, mixing easily to nourish multiple gallons of plants.
MICRONUTRIENT BOOST - Enhanced with essential micronutrients for stronger roots and healthier, more resilient plants—no extra feeding needed.
VIBRANT GROWTH FORMULA - Boost your houseplants with a balanced 15-30-15 nutrient blend designed to maximize green foliage and flower blooms.
DUAL FEEDING FLEXIBILITY - Apply as a foliar spray or root feed—perfect for any plant care routine and continuous feeding systems.

Jack's Classic 15-30-15 Houseplant Special is a water-soluble fertilizer powder enriched with micronutrients, designed to promote vigorous green growth and abundant blooms in houseplants. Its versatile application methods and included measuring spoon make precise feeding effortless, while its gradual nutrient release supports up to 4 months of healthy plant development without risk of burning.

Specifications

ASIN	B00KSMQM0M
Best Sellers Rank	#36,259 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #946 in Garden Fertilizers
Brand Name	Jack's Classic
Coverage	Medium
Customer Reviews	4.7 4.7 out of 5 stars (796)
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
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	1.0 Count

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

€ 47.71

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Croatia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

View all Trustpilot reviews