Can I use these for hanging petunias?

Yes you can use on petunias, just water daily.

Can these be used for outdoor potted flowers??

I’ve used them on azaleas and gardenia’s. They bloomed like crazy.

How long do they last?

Just sitting in a drawer in decent humidity.............a l-o-o-n-g time; in the pot, about 1-2 months. Simply place in pot according to pot size dimensions and leave the tip top so you can see it (them) and after some time pick it up and see if there is product. If gone, push tip into the dirt all the way and be ready to add more when gone, IF, that is, there is need for more fertilizer.

My instruction got lost so How many spikes to use in 12" pot?

4” 2 spikes. 6” 3 spikes. 8” 4 spikes. 10” 5 spikes 12” 6 spikes

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Jobe's Houseplant Fertilizer Spikes

Product ID: 5453166

Details

Brand
Jobe's
Item Form
Sticks
Item Weight
5.67 g
Liquid Volume
0.1 liters
Specific Uses For Product
Plant Growth

⏳60-day slow release

🌿10-10-4 NPK formula

📏Pre-measured spikes

¥119

Duties & taxes included

In stock

Sold byAmazon ChinaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

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

VERSATILE TRUSTED - 50-count pack supports all indoor flowering houseplants, backed by a 4.6-star rating from nearly 2,000 users.
EFFORTLESS PLANT CARE - Simply insert spikes every 60 days—no mess, no runoff, just steady root feeding.
VIBRANT INDOOR BLOOMS - Optimized 10-10-4 NPK formula fuels lush foliage and radiant flowers for your living space.
CLEAN SAFE APPLICATION - Designed to avoid hazards and odors, making plant care hassle-free and pet-friendly.
PRECISION NUTRIENT DELIVERY - Pre-measured spikes eliminate guesswork and prevent over-fertilizing for perfectly nourished blooms.

Jobe's Plant Food Fertilizer Spikes deliver a balanced 10-10-4 NPK nutrient formula directly to the roots of indoor flowering houseplants through easy-to-use, pre-measured spikes. Designed for slow release over 60 days, these 50-count spikes prevent mess and over-fertilization, ensuring vibrant blooms and healthy foliage with minimal effort.

Specifications

ASIN	B000I15ANI
Application Method	Spikes
Best Sellers Rank	#4,045 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #159 in Garden Fertilizers
Brand Name	Jobe's Organics
Coverage	Medium
Customer Reviews	4.6 4.6 out of 5 stars (1,897)
EU Spare Part Availability Duration	2 months
Global Trade Identification Number	30073035252011
Included Components	fertilizer spikes
Item Form	Sticks
Item Type Name	Jobe's Flowering Plant Fertilizer Spikes 10-10-4
Item Weight	5.67 g
Liquid Volume	0.1 liters
Manufacturer	Jobe's
Mixing Ratio	10-10-4
Model Number	05231T
Number of Items	1
Part Number	05231T
Specific Uses For Product	Plant Growth,Root Development,Seed Developmen,tSoil Conditioning
Target Species	Flowering Plant
UPC	073035252010
Unit Count	50 Count
Warranty Description	Warranty

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