Solo 421-S Portable Spreader Review

Fertilizer Spreader Reviews

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Solo has been the manufacturer of reliable gardening tools since 1948 and the 421-S is no exception. Even then, we decided to try it out for ourselves instead of going by word of mouth. And here’s what we found. So, if you’re looking forward to buying it, we highly recommend reading the entire review.

Here is a quick recap of what we liked and didn't like about the Solo 421-S Portable Spreader


  • Ergonomic design
  • Long-lasting and abrasion-resistant
  • Improved maneuverability and control
  • Versatile functioning
  • High operational efficiency


  • Flow-control lever difficult to locate
  • Price may not suit all budgets
Solo, Inc. Solo 421 20-Pound Capacity Portable Chest-mount Spreader with Comfortable Cross-shoulder Strap - 421S
  • Fingertip levers control direction and volume
  • Fully enclosed gearbox-driven agitator is corrosion resistant
  • Large opening allows easy filling and cleaning

What Did We Like About It?

In spite of its hefty price tag, the 421-S has much to offer to the discerning buyer. Outlined before are some of its salient features.

1. Capacity and Ergonomic Design

The 421-S is a fairly large spreader with an impressive weight capacity of 20 lbs. But that’s not all. This powerful gardening equipment is also smartly designed with several nifty features.

First and foremost, the spreader impressed us with its attention to user comfort. Fitted with a cross-shoulder strap, it puts little strain and ensures a comfortable experience, even during prolonged use. Not something we see every day in garden machinery, for sure.

Additionally, the unit has the option of a chest mount. It fits right and snug, and allows for exceptional mobility and negligible fatigue.

2. Excellent Build

Comprising premium-grade materials, Solo makes no compromises when it comes to quality and the results are here for all to see.

The spreader employs rugged polyethylene in its construction and promises to last years of landscaping. Furthermore, the stainless steel components prevent rusting and are highly resistant to abrasions and high-impact use.

Also, the 421-S is well-equipped with lubricated gears and a gearbox that is fully protected from external pollutants. With such a sophisticated internal mechanism, you can rest assured that it will last long enough to give you the most bang for the buck.

3. Versatile Utility

The 421-S doesn’t stop at being a spreader. Far more adept than a wheeled spreader, it works well on uneven terrain and is capable of spreading a wide variety of solid chemicals. Large particles prove to be easy game, and the maneuverability Solo’s unit offers is quite hard to find elsewhere.

4. Additional Features

Apart from its primary functions, the 421-S has a number of features that enhance its appeal. For instance, the screw-on cap serves as a protective cover against dust and chemicals while also preventing spillage.

In addition to that, the spreader boasts of a large opening for the convenience of the user. Be it filling or cleaning, operating this unit is quick and easy.

Lastly, for impeccable control on any terrain, the unit is fitted with levers to regulate flow, volume, and direction that ensure an even spread as well as application.

What Could Have Been Better?

The Solo 421-S is close to perfect, but it’s not quite there yet.

The only area of concern seems to be the flow-control lever which is difficult to locate once the spreader is mounted. Also, the lack of a spring closure often results in the hook detaching from the attachment point.

Such issues dampen the overall experience of using this otherwise excellent device. However, Solo’s customer support is highly responsive and hands-on, and functional problems are easily resolved.

About the Author

Steve has been gardening for over 20 years now. He enjoys sharing his experiences with others.

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