High Quality Medium Propagator with Room to Grow ! Stewart Quality Unheated Propagators: This high quality propagator features high lid and adjustable ventilation panels. Additional height ensures your seedlings won’t run out of space too soon. Plant direct or in seed trays and pots. Add holes for drainage. – Humidity and air temperature controlled via adjustable ventilation panels – Durable clear cover impact resistant maximum light – Long life base tray – plant direct or in seed trays and pots.