Mr. Pen seed starter tray with 12-cell design and moisture control dome
Mr. Pen kit showing adjustable vents for proper airflow
Mr. Pen seed tray cells with drain holes to prevent overwatering
Mr. Pen seed starter tray demonstrates root-friendly release during transplanting
Mr. Pen shovel and scoop included in seed starter kit for easy planting
Mr. Pen durable plastic seed tray designed for reuse
Mr. Pen humidity vented dome and base for seed starting
Mr. Pen complete seed starting solution with 10 kits

Mr. Pen

Mr. Pen Seed Starter Tray Kits – 10-Pack, 120 Cells, Humidity Dome & Vent, 6.6 x 4.6 in

High-performance patio lawn and garden made for confident daily results

$19.43

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Why customers choose Cera Garden

Effortless seed starting with a complete kit

Mr. Pen Seed Starter Tray Kits arrive as a 10-pack of compact, 12-cell trays designed to support indoor planting projects. Each tray measures about 6.6 by 4.6 inches and features a clear, dome-style lid that helps you monitor moisture while still providing airflow. The set delivers a total of 120 cells, offering a organized system for starting multiple varieties at once.

Key design elements work together to simplify seed starting and give you flexibility as seedlings grow:

  • Transparent domes create a microclimate that preserves humidity, with adjustable vents to tune airflow as seedlings mature.
  • Drain holes at the bottom of each cell help prevent overwatering and reduce the risk of root issues.
  • Root disturbance is minimized when lifting young plants, thanks to a release-friendly tray design that supports easy transplanting.

What you get in the kit

  • Ten 12-cell trays with durable plastic construction
  • Clear, vented domes and sturdy bases for stable setups
  • Adjustable ventilation to balance moisture and air exchange
  • Included shovel and scoop for easy planting and transplanting

How to use

  • Fill trays with seed starting mix and sow seeds according to variety instructions.
  • Water carefully and monitor moisture through the dome and vents, avoiding soggy soil.
  • As cells sprout, gradually expose seedlings to ambient conditions to harden off before transplanting.

Why gardeners consider this kit

From hobbyists to small-scale indoor gardeners, this set offers a compact, organized way to start seeds indoors or in a greenhouse. The built-in features emphasize control, visibility, and practicality, helping you manage early-stage care with confidence.

FAQ

Q: What is included in the Mr. Pen Seed Starter Tray Kit?

A: Each order includes 10 sets of 12-cell trays, transparent domes, adjustable vents, bases, plus a shovel and scoop.

Q: What are the benefits of the humidity domes?

A: The domes help maintain moisture and airflow with adjustable vents, supporting steady seedling growth during early stages.

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