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Seeding bench at Maple Park Farm.   Promix is used to ensure healthy seedlings in our local greenhouse.  We grow bedding plants, cut flowers and vegetables.

What makes a good seed starting mix?

Your seed starting mix should be a finely ground mixture of peat moss, perlite and vermiculite.

Peat moss: is naturally spongy therefore allows for increased water retention.

Perlite: decreases water holding capacity which results in better drainage.  It also increases air porosity

Vermiculite: increases air porosity 

This ensures that the seedling don't have any huge particles to try and grow around while maintaining good aeration of the media with lots of space for water retention.  It is essential your seedling mix be sterile.  You do not want weed seeds, bacteria or other things attacking your seedlings as they grow.

For more detailed information on each of these components and their benefits, PT Horticulture has great videos by Horticulture Specialist Troy Buechel.  They are 3-5 minutes long each and full of great information.  Here are the links to the videos:

Peat Moss: PRO-MIX Growing Media Components Explained: Sphagnum Peat Moss | PRO-MIX Greenhouse Growing (

Perlite: PRO-MIX Growing Media Components Explained: Perlite| PRO-MIX Greenhouse Growing (

Vermiculite: PRO-MIX Growing Media Components Explained: Vermiculite| PRO-MIX Greenhouse Growing (


We hope you enjoy the videos and get as excited about growing as we do!!

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