Will it treat black spot and powdery mildew on roses?

Those are what it is intended for, along with similar leaf diseases on flowering plants. Start at the first spotting rather than waiting - fungicides protect healthy tissue far better than they rescue badly infected leaves.

Do I need to mix it with water?

No. It connects directly to a garden hose and doses itself as you spray. Shake first, cover the tops and undersides of the leaves, and stop when the bottle runs out. Do not transfer it to a pump sprayer.

Will it burn or mark the blooms?

Spray in early morning or evening, never in full midday sun or onto heat-stressed plants, and test one plant first if you are unsure. Avoid soaking open flowers. Follow the label's precautions for your plant types.

Is it safe for bees and other pollinators?

Roses draw pollinators, so treat at dusk or early morning when bees are not active and keep spray off open blooms. Let it dry fully before the garden is back in use. Read the label's pollinator guidance before applying.

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Arber Organic Rose Fungicide RTS - Black Spot & Powdery Mildew, 16 oz

Product ID: 718612389

Details

Brand
ARBER
Item Form
Liquid
Item Volume
16 fluid
Material Feature
Recyclable of
Scent
Unscented

🌿Controls 3 major rose diseases

🚿Hose-end sprayer ready

🦠Biological active microbe

€ 65.57

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Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌹 Spray Smart, Grow Proud: The Organic Shield Your Roses Deserve!

ECO FRIENDLY POWER - Biological active ingredient, not harsh copper or sulfur dust—safe for blooms and environment.
PREVENTIVE PROTECTION - Start early and spray every two weeks to keep your roses flawless all season.
SUSTAINABLE PACKAGING - 16 oz recyclable bottle made with 30% post-consumer recycled material.
TRIPLE THREAT DEFENSE - Targets black spot, powdery mildew, and rust for healthier, lush roses.
EFFORTLESS APPLICATION - Hose-end sprayer attached—spray straight from the bottle, no mixing needed.

Arber Organic Rose Fungicide RTS is a 16 oz ready-to-spray biological fungicide designed to prevent black spot, powdery mildew, and rust on roses. Featuring a hose-end sprayer for easy application, it uses beneficial microbes instead of copper or sulfur dust, making it safe for blooms and eco-conscious gardeners. Start early and maintain a bi-weekly spray cycle for optimal disease control, all packaged in a recyclable bottle with 30% recycled content.

Specifications

ASIN	B0DV3QD6CK
ASIN	B0DV3QD6CK
Best Sellers Rank	#2,195 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #97 in Insect & Pest Repellent Sprays
Brand Name	ARBER
Customer Reviews	4.2 4.2 out of 5 stars (1,270)
Date First Available	January 25, 2025
Included Components	bottle
Indoor Outdoor Usage	Indoor, Outdoor
Item Form	Liquid
Item Highlight	Biological, not a copper or sulfur dust - hose-end sprayer, nothing to mix
Item Volume	16 fluid ounces
Item model number	1-331722-1
Manufacturer	Arber
Manufacturer	Arber
Material Features	Recyclable, made of 30% PCR
Model Number	1-331722-1
Number of Items	1
Product Dimensions	4 x 2.3 x 9 inches; 1.32 pounds
Scent Name	Unscented
Size	16 Fl Oz (Pack of 1)
Target Species	Controls black spot, downy mildew, rust, anthracnose, and other fungal diseases on flowers.
UPC	850025915465
Unit Count	16 Fluid Ounces

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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.

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€ 65.57

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

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

Ali H.

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

1 day ago

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