Do you just stick these by the base of the bush? How long do they last?

Yes you will want to stick it near the base of the bush. They seemed to last about 4-6 weeks on my plants. And my roses have never done better.

can it be used for rose of sharon

They are not quite the same type of plant. Jobes makes an all-purpose spike, which is what the rose of sharon is supposed to get. I wouldn't over fertilize either, since it will promote new growth, but not necessarily blooms. Now is a good time, early spring.

Can this be applied with the initial Spring fertilizer timeline of roses, or should it be used separately (later)?

You can use in spring by itself . . .I would not recommend combining with additional fertilizer. The stakes are large and depending on the size of the roses, you use more than one for each bush.

Do these work on knock out roses?

I feed my Knockouts 10 10 10 and they look fantastic. I use the Jobe's spikes on my hybrid roses and climbers. I feel sure the knockouts would also love them.

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Rose Fertilizer Spikes, Easy Plant Care Plant Fertilizer for Rose, Hydrangea, Hibiscus, Azalea, and Other Flowering Shrubs, 10 Count

Product ID: 256680419

Details

Brand
Jobe's
Global Trade Identification Number
Item form
Sticks
Item weight
0.45 Pounds
Specific uses for product
Flowering

⏳Feeds plants for 8 weeks

🌹9-12-9 NPK for vibrant blooms

🧴Pre-measured, mess-free spikes

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Description

🌸 Feed your roots, flaunt your blooms—effortless elegance in every spike!

BLOOM LIKE A PRO - Precision 9-12-9 nutrient formula fuels lush, vibrant roses and flowering shrubs.
EFFORTLESS PLANT CARE - Pre-measured spikes eliminate guesswork and prevent over-fertilizing—perfect for busy pros.
VERSATILE FLORAL BOOST - Ideal for roses, hydrangeas, hibiscus, azaleas, and more—your secret weapon for standout blooms.
CLEAN SAFE APPLICATION - No mess, no smell, and safe around kids and pets—garden care without compromise.
LONG LASTING NOURISHMENT - Continuous root feeding for up to 8 weeks keeps your garden thriving through the season.

Jobe's Organics Rose Fertilizer Spikes deliver a balanced 9-12-9 NPK formula in pre-measured, mess-free sticks that feed flowering plants like roses and shrubs continuously for 8 weeks. Designed for easy, safe application with no runoff or odors, these spikes ensure vibrant blooms and lush foliage, making them a must-have for gardeners seeking professional results with minimal effort.

Specifications

ASIN	B0000BYCPP
Brand	Jobe's Organics
Brand Name	Jobe's Organics
Coverage	Medium
Customer Reviews	4.6 out of 5 stars 3,350 Reviews
Global Trade Identification Number	00073035040020
Item Form	Sticks
Item Type Name	Rose
Item Weight	0.45 Pounds
Item form	Sticks
Item weight	0.45 Pounds
Manufacturer	Jobe's
Mixing Ratio	9-12-9
Model Number	04102
Number of Items	1
Part Number	4102
Specific Uses For Product	Flowering Plant Fertilization
Specific uses for product	Flowering Plant Fertilization
Target Species	roses
UPC	073035040020
Unit Count	10 Count

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€ 47.92

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

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TrustScore 4.5 | 7,300+ reviews

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