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
0.2 Ounces
Liquid Volume
0.1 Liters
Specific Uses For Product
Plant Growth

⏳60-day nutrient delivery

🌿50 slow-release spikes

⚖️10-10-4 balanced NPK formula

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P316

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In stock

Sold byAmazon BotswanaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌸 Feed your roots, flaunt your blooms—effortless plant luxury!

EFFORTLESS ROOT FEEDING - Pre-measured spikes deliver precise nutrients directly to roots—no guesswork, no mess.
TRUSTED BY PLANT LOVERS - Join thousands of satisfied users who’ve transformed their indoor gardens with Jobe’s spikes.
LONG LASTING NOURISHMENT - Slow-release action feeds your plants consistently for up to 60 days—set it and forget it.
VIBRANT BLOOMS GUARANTEED - Optimized 10-10-4 NPK formula fuels brighter flowers and lush foliage for standout indoor plants.
CLEAN CONVENIENT APPLICATION - No spills, no runoff, no odors—just simple stick-and-grow plant care.

Jobe's Houseplant Fertilizer Spikes come in a pack of 50 pre-measured, slow-release sticks formulated with a balanced 10-10-4 NPK ratio. Designed for indoor flowering plants, these spikes deliver nutrients directly to the roots over 60 days, ensuring vibrant blooms and healthy foliage without mess or over-fertilizing. Ideal for busy plant enthusiasts seeking hassle-free, effective plant care.

Specifications

ASIN	B000I15ANI
Best Sellers Rank	#5,240 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #210 in Garden Fertilizers
Brand	Jobe's Organics
Brand Name	Jobe's Organics
Coverage	Medium
Customer Reviews	4.6 out of 5 stars 1,855 Reviews
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	0.2 Ounces
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	50.0 Count
Warranty Description	Warranty

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