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expiredRokket | Staff posted Jul 04, 2025 04:23 PM
expiredRokket | Staff posted Jul 04, 2025 04:23 PM

Prime Members: 3-Lb Miracle-Gro Water Soluble Tomato Plant Food

+ Free Shipping

$7.50

$16

53% off
Amazon
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Deal Details
Amazon has for Prime Members: 3-Lb Miracle-Gro Water Soluble Tomato Plant Food for $7.48. Shipping is free.

Thanks to Deal Hunter Rokket for finding this deal.

Features:
  • Instantly feeds to grow bigger, more bountiful vegetables versus unfed plants
  • Feed every 1-2 weeks
  • Great for tomatoes and vegetables
  • Use with Miracle-Gro Garden Feeder or any watering can
  • Safe for all plants, guaranteed not to burn when used as directed

Editor's Notes

Written by oceanlake
  • About this deal:
    • Our research indicates that this offer is $3.21 lower (30% savings) than the next best available price from a reputable merchant with prices starting from $10.69
  • About this product:
    • Rating of 4.7 from over 9000 customer reviews.
  • About this store:

Original Post

Written by Rokket | Staff
Product Info
Community Notes
About the Poster
Deal Details
Product Info
Community Notes
About the Poster
Amazon has for Prime Members: 3-Lb Miracle-Gro Water Soluble Tomato Plant Food for $7.48. Shipping is free.

Thanks to Deal Hunter Rokket for finding this deal.

Features:
  • Instantly feeds to grow bigger, more bountiful vegetables versus unfed plants
  • Feed every 1-2 weeks
  • Great for tomatoes and vegetables
  • Use with Miracle-Gro Garden Feeder or any watering can
  • Safe for all plants, guaranteed not to burn when used as directed

Editor's Notes

Written by oceanlake
  • About this deal:
    • Our research indicates that this offer is $3.21 lower (30% savings) than the next best available price from a reputable merchant with prices starting from $10.69
  • About this product:
    • Rating of 4.7 from over 9000 customer reviews.
  • About this store:

Original Post

Written by Rokket | Staff

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Top Comments

TommyC3884
29 Posts
18 Reputation
Npk 18:18:21
desynergy
3974 Posts
978 Reputation
It's almost clearance time to stock up everything for next year.
bakerzdosen
2475 Posts
930 Reputation
Look, apologies if this is common knowledge but I only recently learned a lot of this:

There are basically two types of fertilizers: organic and water soluble. This is the latter.

Water soluble is made in a lab (not necessarily a bad thing…) to exact NPK specs. In other words, at 18:18:21, this is 18% nitrogen, 18% phosphorus, 21% potassium, and 43%… other stuff—typically inert binding agents. It's meant to deliver those 3 things and nothing else.

Organic fertilizers are made from exactly what you'd expect: organic, or dead (formerly living) materials.

And the thing is that organic fertilizers have one advantage and one disadvantage:

Advantage: they hold, and as such provide, micronutrients behind the 3 NPK elements. Those not only can help your plants but also condition your soil.

Disadvantage: the organic fertilizers need to be buried or somehow worked into your soil because they need to break down and decompose before they're of any use to your plants. This can also be an advantage because you place the stuff below your plants when you transplant them and they'll be "fed" for a while as the stuff breaks down.

And really, you should ideally be using both types of fertilizers depending on your situation.

Anyway, this is a fairly good price for a water soluble multipurpose fertilizer. Your plants aren't going to care if the NPK ratio is 18:18:21 or 20:20:20 or whatever (or even 10:10:10, as long as you add more of it.)

Just don't assume this stuff is all you need to do to feed your garden.

21 Comments

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Jul 04, 2025 09:27 PM
241 Posts
Joined Dec 2015
KurbiseaterJul 04, 2025 09:27 PM
241 Posts
Does this work for pumpkins ?
Jul 04, 2025 10:49 PM
3,974 Posts
Joined Jul 2012
desynergyJul 04, 2025 10:49 PM
3,974 Posts
It's almost clearance time to stock up everything for next year.
Original Poster
Pro
Deal Hunter
Jul 04, 2025 11:42 PM
42,242 Posts
Joined Jun 2011
RokketJul 04, 2025 11:42 PM
Original Poster
Pro
Deal Hunter
42,242 Posts
This is $10.69 at Home Depot and Lowe's. I think Walmart is OOS (3rd party seller is $13.45).
Jul 05, 2025 03:33 AM
11,089 Posts
Joined Sep 2007
papitosabeJul 05, 2025 03:33 AM
11,089 Posts
Just tomatoes? I wonder what makes it just for that...
Jul 05, 2025 03:56 AM
28 Posts
Joined Aug 2012
loggiestarJul 05, 2025 03:56 AM
28 Posts
This price is only for Prime members.
Jul 05, 2025 04:07 AM
29 Posts
Joined Nov 2018
TommyC3884Jul 05, 2025 04:07 AM
29 Posts

Our community has rated this post as helpful. If you agree, why not thank TommyC3884

Npk 18:18:21
4
Original Poster
Pro
Deal Hunter
Jul 05, 2025 04:23 AM
42,242 Posts
Joined Jun 2011
RokketJul 05, 2025 04:23 AM
Original Poster
Pro
Deal Hunter
42,242 Posts
Quote from loggiestar :
This price is only for Prime members.
You are right; I will update the original post. Thanks much for the reminder.

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Original Poster
Pro
Deal Hunter
Jul 05, 2025 02:48 PM
42,242 Posts
Joined Jun 2011
RokketJul 05, 2025 02:48 PM
Original Poster
Pro
Deal Hunter
42,242 Posts
This deal is still available today (for Prime members), I think it's quite slick.
Jul 05, 2025 07:54 PM
2,475 Posts
Joined Dec 2007
bakerzdosenJul 05, 2025 07:54 PM
2,475 Posts
Look, apologies if this is common knowledge but I only recently learned a lot of this:

There are basically two types of fertilizers: organic and water soluble. This is the latter.

Water soluble is made in a lab (not necessarily a bad thing…) to exact NPK specs. In other words, at 18:18:21, this is 18% nitrogen, 18% phosphorus, 21% potassium, and 43%… other stuff—typically inert binding agents. It's meant to deliver those 3 things and nothing else.

Organic fertilizers are made from exactly what you'd expect: organic, or dead (formerly living) materials.

And the thing is that organic fertilizers have one advantage and one disadvantage:

Advantage: they hold, and as such provide, micronutrients behind the 3 NPK elements. Those not only can help your plants but also condition your soil.

Disadvantage: the organic fertilizers need to be buried or somehow worked into your soil because they need to break down and decompose before they're of any use to your plants. This can also be an advantage because you place the stuff below your plants when you transplant them and they'll be "fed" for a while as the stuff breaks down.

And really, you should ideally be using both types of fertilizers depending on your situation.

Anyway, this is a fairly good price for a water soluble multipurpose fertilizer. Your plants aren't going to care if the NPK ratio is 18:18:21 or 20:20:20 or whatever (or even 10:10:10, as long as you add more of it.)

Just don't assume this stuff is all you need to do to feed your garden.
1
Jul 05, 2025 07:56 PM
1,137 Posts
Joined Jan 2006
TepJul 05, 2025 07:56 PM
1,137 Posts
I ordered 3, great deal!
Jul 05, 2025 08:00 PM
1,137 Posts
Joined Jan 2006
TepJul 05, 2025 08:00 PM
1,137 Posts
Quote from bakerzdosen :
Look, apologies if this is common knowledge but I only recently learned a lot of this:

There are basically two types of fertilizers: organic and water soluble. This is the latter.

Water soluble is made in a lab (not necessarily a bad thing…) to exact NPK specs. In other words, at 18:18:21, this is 18% nitrogen, 18% phosphorus, 21% potassium, and 43%… other stuff—typically inert binding agents. It's meant to deliver those 3 things and nothing else.

Organic fertilizers are made from exactly what you'd expect: organic, or dead (formerly living) materials.

And the thing is that organic fertilizers have one advantage and one disadvantage:

Advantage: they hold, and as such provide, micronutrients behind the 3 NPK elements. Those not only can help your plants but also condition your soil.

Disadvantage: the organic fertilizers need to be buried or somehow worked into your soil because they need to break down and decompose before they're of any use to your plants. This can also be an advantage because you place the stuff below your plants when you transplant them and they'll be "fed" for a while as the stuff breaks down.

And really, you should ideally be using both types of fertilizers depending on your situation.

Anyway, this is a fairly good price for a water soluble multipurpose fertilizer. Your plants aren't going to care if the NPK ratio is 18:18:21 or 20:20:20 or whatever (or even 10:10:10, as long as you add more of it.)

Just don't assume this stuff is all you need to do to feed your garden.
I agree 100%, I do wood chips in my pots and garden, but they take a long time (1 year or more) to decompose. I use this as a booster and since the decay process takes some Nitrogen from the soil it is necessary for better yields.
Jul 05, 2025 08:06 PM
197 Posts
Joined Sep 2013
HOWARDH3121Jul 05, 2025 08:06 PM
197 Posts
Purchased. A terrific deal. I'm hesitant to use it, have two 7' plants and don't know how to can tomatoes. E5
Jul 05, 2025 10:17 PM
706 Posts
Joined Jul 2020
MattacksJul 05, 2025 10:17 PM
706 Posts
Quote from bakerzdosen :
Look, apologies if this is common knowledge but I only recently learned a lot of this:

There are basically two types of fertilizers: organic and water soluble. This is the latter.

Water soluble is made in a lab (not necessarily a bad thing…) to exact NPK specs. In other words, at 18:18:21, this is 18% nitrogen, 18% phosphorus, 21% potassium, and 43%… other stuff—typically inert binding agents. It's meant to deliver those 3 things and nothing else.

Organic fertilizers are made from exactly what you'd expect: organic, or dead (formerly living) materials.

And the thing is that organic fertilizers have one advantage and one disadvantage:

Advantage: they hold, and as such provide, micronutrients behind the 3 NPK elements. Those not only can help your plants but also condition your soil.

Disadvantage: the organic fertilizers need to be buried or somehow worked into your soil because they need to break down and decompose before they're of any use to your plants. This can also be an advantage because you place the stuff below your plants when you transplant them and they'll be "fed" for a while as the stuff breaks down.

And really, you should ideally be using both types of fertilizers depending on your situation.

Anyway, this is a fairly good price for a water soluble multipurpose fertilizer. Your plants aren't going to care if the NPK ratio is 18:18:21 or 20:20:20 or whatever (or even 10:10:10, as long as you add more of it.)

Just don't assume this stuff is all you need to do to feed your garden.
There's plenty of organic liquid water soluble fertilizers
Jul 06, 2025 01:08 AM
1,221 Posts
Joined Aug 2014
Frankie251Jul 06, 2025 01:08 AM
1,221 Posts
Quote from papitosabe :
Just tomatoes? I wonder what makes it just for that...
Nothing really. It has a little less nitrogen than regular MG and a little more potassium, but calling it tomato fertilizer is just marketing. Plants don't suck up fertilizer like drinking from a straw. There's lots of complicated processes going on in the soil that feeds plants. Nutrition levels are just one aspect.

https://youtu.be/_NJK3LFeFhc?si=qIIIB7l6Ub0HWDw_
1

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Jul 06, 2025 01:17 AM
1,221 Posts
Joined Aug 2014
Frankie251Jul 06, 2025 01:17 AM
1,221 Posts
Quote from bakerzdosen :
Look, apologies if this is common knowledge but I only recently learned a lot of this:

There are basically two types of fertilizers: organic and water soluble. This is the latter.

Water soluble is made in a lab (not necessarily a bad thing…) to exact NPK specs. In other words, at 18:18:21, this is 18% nitrogen, 18% phosphorus, 21% potassium, and 43%… other stuff—typically inert binding agents. It's meant to deliver those 3 things and nothing else.

Organic fertilizers are made from exactly what you'd expect: organic, or dead (formerly living) materials.

And the thing is that organic fertilizers have one advantage and one disadvantage:

Advantage: they hold, and as such provide, micronutrients behind the 3 NPK elements. Those not only can help your plants but also condition your soil.

Disadvantage: the organic fertilizers need to be buried or somehow worked into your soil because they need to break down and decompose before they're of any use to your plants. This can also be an advantage because you place the stuff below your plants when you transplant them and they'll be "fed" for a while as the stuff breaks down.

And really, you should ideally be using both types of fertilizers depending on your situation.

Anyway, this is a fairly good price for a water soluble multipurpose fertilizer. Your plants aren't going to care if the NPK ratio is 18:18:21 or 20:20:20 or whatever (or even 10:10:10, as long as you add more of it.)

Just don't assume this stuff is all you need to do to feed your garden.
Great post. You nailed it. I use both organic and synthetic fertilizers and home made compost. Organic fertilizers, including compost, takes time to break down and feed plants. Synthetic fertilizers, used in moderation, feed both plants and microbes, keeping your soil healthy.

https://youtu.be/_NJK3LFeFhc?si=qIIIB7l6Ub0HWDw_

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