Jobes tomatoe spikes, what is the NPK and calcium content

That's because there isn't any. Jobe's has a product in granular form called Jobe's Tomato and Vegetable Plus Biozome Science + Nature that is a 10-8-4 but also has 9% Calcium, 1% Magnesium and 9% Sulfur. None of the Jobe's spike form Tomato fertilizer that I have seen has that. They are just straight 6-18-6

Can they be used for potted tomato plants?

Yes they can. I had my basil in pots and used them. They turned out great as well. I also grew some peppers in a 18 gallon containers. The spikes worked well in the 18 gallon containers. I hope this helps! :)

Is this fertilizer good for strawberrys ???

I've never grown strawberry. This fertilizer blend is for blooming plants. The strawberry fruit is that plant bloom so I suspect Jobes would be a good choice.

Do you have to use this on seedlings or can you use it on a plant that's already grown that is not producing well?

You can use it on seedlings or plants up to when they are about 15" high. Does a great job in the production of tomatoes. Use once and it lasts all season.

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🍅 Grow like a pro—tomato success made simple!

MESS FREE SAFE - No spills, no smells, no hazards—perfect for busy urban gardeners who value clean, efficient solutions.
PRE MEASURED PRECISION - Each spike is perfectly portioned to avoid guesswork and over-fertilizing, giving your plants exactly what they need.
EFFORTLESS ROOT FEEDING - Just insert spikes and let the slow-release formula do the work for 8 weeks of continuous nourishment.
MAXIMIZED NUTRIENT ABSORPTION - Delivers nutrients directly underground, preventing washout and ensuring your tomatoes get every bit of goodness.
RESEALABLE WATERPROOF PACKAGING - Keeps spikes fresh and ready to use season after season, so you never miss a beat in your garden routine.

Jobe's Organics Tomato Fertilizer Spikes provide a convenient, slow-release nutrient boost directly to tomato roots for up to 8 weeks. Designed for mess-free application, these pre-measured spikes maximize nutrient uptake while preventing runoff, ensuring healthier, more productive tomato plants with minimal effort.

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Liquid Volume	1 Milliliters
Item Weight	0.3 Pounds
Specific Uses For Product	Root Development, Plant Growth, Soil Conditioning, Seed Development
Target Species	Tomato and Vegetable
Coverage	Medium
Item Form	Sticks
Mixing Ratio	6-18-6

Jobe's Organics Tomato Fertilizer Spikes, 18 Spikes

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