Has anyone had problems with hummbirds not like the preservative?

I've been using this stuff for probably 10 years and I have no problem with them liking it they love it it takes good care of keeping my feeder fresh I would recommend it

Does the bottle show an expiration date? If I don't use it up this year, will it still be good next year?

The bottles do not have expiration dates on them, but the bag they come in does. I bought mine this year and they don’t expire until12/2026

Should the hummingbird nectar preservative be refrigerated?

We do not refrigerate the nectar preservative. It's not required.

Anyone know the milligram per liter concentration of copper sulfate in this stuff?

All it says on the bottle is that copper sulfate is a micronutrient; no percentages.

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Nectar Defender Hummingbird Nectar Extender, Bird-Safe, Natural, 2-Pack | Bird-safe, Keeps nectar fresh, Reduces spoilage, Extends nectar up to 2 weeks, Dye-free, Protects 16 quarts, Made in USA

Nectar Defender Hummingbird Nectar Extender, Bird-Safe, Natural, 2-Pack | Bird-safe, Keeps nectar fresh, Reduces spoilage, Extends nectar up to 2 weeks, Dye-free, Protects 16 quarts, Made in USA

Product ID: 107602388

Details

Brand
Sapphire Labs
Product Dimensions
3"L x 1.5"W x
Recommended Uses For Product
Extending in
Special Feature
Easy-Refill
Target Species
Hummingbird

⏳Extends nectar freshness up to 2 weeks

🌿100% natural, dye-free, bird-safe formula

🛡️Protects 16 quarts of nectar from spoilage

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Description

🕊️ Nectar Defender: Because your hummingbirds deserve the freshest sip in town!

ECO CHIC FEEDING - Made in the USA with a natural micronutrient formula that supports hummingbird wellbeing.
PURE PROTECTED - Zero artificial ingredients and dyes ensure your feathered friends get only the healthiest nectar boost.
FEED MORE WASTE LESS - One 2-pack protects up to 16 quarts of nectar, maximizing your feeder’s efficiency and your backyard’s buzz.
EFFORTLESS NECTAR UPGRADE - Just add a dash to your homemade mix—no more wasting money on pre-made nectar.
STAY FRESH STAY FABULOUS - Keeps your hummingbird nectar fresh for a full 14 days—less hassle, more hummingbird magic.

Nectar Defender is a natural, bird-safe nectar extender that keeps hummingbird nectar fresh for up to two weeks. Free from dyes and artificial ingredients, it protects up to 16 quarts of nectar with a micronutrient formula designed to reduce spoilage and promote hummingbird health. Easy to use and made in the USA, this 2-pack offers a cost-effective, eco-friendly solution for vibrant backyard bird feeding.

Specifications

ASIN	B07DH1935S
Additional Features	Easy-Refill Top
Best Sellers Rank	#5,686 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #21 in Outdoor Bird Feeder Accessories
Brand Name	Sapphire Labs
Capacity	0.11 liters
Color	Clear
Customer Reviews	4.7 4.7 out of 5 stars (1,467)
Included Components	4 oz. Bottle, Micro-nutrient for hummingbirds, User manual
Item Dimensions L x W x H	3"L x 1.5"W x 5.5"H
Item Weight	8 ounces
Manufacturer Part Number	SG_B07DH1935S_US
Model Number	SG_B07DH1935S_US
Number of Items	2
Number of Packs	2
Recommended Uses For Product	Extending nectar freshness in hummingbird feeders
Target Species	Hummingbird
Theme	Hummingbird Feeding
UPC	811024001092
Unit Count	8 Fluid Ounces

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₨944

Duties & taxes included

In stock

Sold byAmazon SeychellesDelivered 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 Seychelles.

Secure transaction

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