The ultimate cost-effective solution for high-volume seed starting, winter leeks, onions, and plug plant propagation.

Sized perfectly to fit flawlessly inside British Standard seed trays and watertight gravel trays, this high-value pack of 10 50-cell inserts allows you to maximise every inch of your greenhouse staging. With 50 cells per tray, this bulk pack gives you an impressive 500 individual cell capacity—ideal for allotment growers, cut flowers, and market gardens.

Lightweight & Easy-Pop Design: These inserts are specifically engineered as pliable, lightweight propagation trays. The flexible plastic allows you to gently press the base of each individual cell to pop young plug plants out cleanly without tearing or damaging delicate root systems. (Looking for heavy-duty, ultra-rigid trays for multi-year reuse? Check out our robust Bedding Packs!)

Key Features & Specifications:

• Pack Size: 10 Cell Inserts (500 total plant cells)

• Dimensions: Designed to fit standard British seed trays (344mm x 214mm x 52mm approx.)

• Healthy Root Drainage: Base drainage holes in every cell prevent waterlogging and encourage optimal air pruning and bottom watering.

• Easy Plug Removal: Perforated sections, pliable construction for effortless plant popping when potting on.

• Best Uses: High-density autumn sowing, winter leeks, onions, brassicas, bedding plants, and cut flowers.

Custom Quantities & Mixed Orders: Looking for a custom bundle, bulk orders, or a mix of different cell tray sizes? Get in touch before ordering and we will happily arrange a tailored setup for your growing needs!

Need a smaller pack or seed trays? View our 10 x 40 Cell Seed Tray Inserts or explore our 20 x Standard Seed Trays Without Holes for matching watertight outer trays.