Best Lawn Mowers — 31L grass box + Small gardens (2026)
2 lawn mowers matching capacity “31L grass box” + best for “Small gardens”, hand-picked from UK Amazon listings.
Not sure which one to pick? Read our Best Lawn Mower for Small Gardens UK guide.
This 31L grass box collection is designed with smaller garden spaces in mind. These robust boxes are perfectly sized for collecting clippings from lawns maintained by a small to medium-sized lawn mower, offering efficient and contained collection. The generous 31 litre capacity significantly reduces the number of trips needed to empty the box, saving you valuable time when maintaining your small suburban lawn. This range is ideal for those with limited storage space or who appreciate a tidy finish without excessive mess.
The compact design of these grass boxes complements smaller mowing tasks and ensures they can easily fit into sheds or garages. They're built to withstand the rigors of regular use, providing reliable performance season after season. These boxes are particularly well-suited for those using rotary lawn mowers – their robust construction handles the debris effectively.
When combined with a suitable lawn mower, this collection provides a practical solution for maintaining a healthy and attractive small garden. Consider pairing these grass boxes with a lightweight, maneuverable lawn mower to optimize your gardening efforts. Regularly emptying the box will prevent clumping of clippings, ensuring a consistently neat appearance.

#1 Pick
MZK 20V 34cm Cordless Lawnmower, Brushless, with 2x 4Ah Battery and Charger- Cordless
- Small gardens
- 31L grass box
£109.99
Pros
- Two batteries included for extended runtime
- Brushless motor for quieter, more efficient cutting
- Lightweight push design with 4 cutting heights
Cons
- 31L grass box suits small-to-medium lawns only

#2 Pick
Bosch Corded Lawnmower EasyRotak 32-225- Electric
- Small gardens
- 31L grass box
£79.99
Pros
- Compact 32cm width suits small gardens
- 31L grass box
- Lightweight and easy to manoeuvre
Cons
- Corded — limited reach
- Manual height adjustment only
FAQ
What type of lawn mowers are these grass boxes best suited for?+
These 31L grass boxes are most effectively used with rotary lawn mowers. The robust construction can handle the larger volume of clippings produced by these types of machines, minimizing overflowing and ensuring efficient collection.
How easy are they to empty?+
They're designed for quick and simple emptying. The wide opening makes it easy to scoop out the collected grass, and the robust construction means you don’t need to worry about damaging the box.
What size garden would these be suitable for?+
These boxes are ideal for gardens up to approximately 100 square metres. While they can handle larger areas, frequent emptying will be more efficient in smaller spaces.
Are the grass boxes durable?+
Yes, they’re built from high-quality plastic designed to withstand regular use and exposure to the elements. The robust design prevents cracking or damage during normal operation.
Do I need a specific type of lawn mower to get the best results?+
While compatible with most rotary mowers, a lighter-weight mower will make collection easier due to the box's capacity and size. Overly heavy mowers might strain the user when emptying the box.
How do I clean the grass boxes?+
Simply rinse the inside of the box with water after use. Allow it to dry completely before storing to prevent mildew or bacterial growth – ensure no moisture remains within the plastic.
What is the maximum capacity of the grass box?+
The 31L grass box has a stated capacity of 31 litres, which is suitable for collecting clippings from a lawn area up to approximately 100 square metres.
Are these grass boxes difficult to assemble?+
These grass boxes are typically flatpack and require minimal assembly – usually just unfolding the box and securing it. All necessary fixings are included in the packaging.
What is the plastic material used for the grass boxes made from?+
They’re manufactured from a durable, UV-resistant polypropylene plastic that's designed to resist cracking or fading when exposed to sunlight and weather conditions.
Can these grass boxes be used with electric lawn mowers?+
Yes, they can be used effectively with electric lawn mowers. However, consider the weight of the mower when emptying the box – lighter mowers will make collection easier.