Tag Archives: Growing in a Greenhouse

Recipe for Seed-Starting Mix

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Basic Recipe for Seed-Starting Mix

4 parts compost
1 part perlite
1 part vermiculite
2 parts peat moss
That there is little to no nutrition in the mix, because seeds come with their own, built-in nutrition.  (“A seed is a baby plant in a box, with it’s lunch.”)
Seed starting mix is finer than other  mixes, so it’s important that the compost used is very fine. ~Sherri Morgan, Master Gardener & AGC Board Member

Photo by: Carlotta Lucas, AGC Board Member

Get Ready – Grow!

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Seedlings in your Greenhousetwo true leaves

Start by:

  • Sanitizing your greenhouse shelves using 1 part bleach mixed with 9 parts water.
  • Clean trays and pots with this same bleach mixture.
  • Sweep floor and clean walls
  • Buy Seedling Mix – it’s not potting soil, it’s a soilless mixture for seed starting.
  • Assemble plant labels & permanent markers in your greenhouse.
  • Have your water source ready.

After you’ve sanitized  EVERYTHING!

Pre-moisten your seedling mix by pouring it into a bucket and adding water until it’s damp. Fill trays with pre-moistened seedling mix and water thoroughly.
Let trays sit a day in the greenhouse to warm up.

Start your seeds 8-12 weeks before the last frost date in your area.
In the Rouge Valley, Oregon the last frost is estimated to be May 15th.
Count backwards 8 or 12 weeks and plant seeds in your greenhouse.

Example: To plant by May 15th, then…

For 8 weeks: Plant seeds in the greenhouse by March 15th
For 12 weeks: Plant seeds in the greenhouse by February 15th

Be sure to read the seed packet instructions before planting.
These instructions tell you how deep to plant and long it takes for the seeds to germinate. And. it shows you what this seedling will look like when the seed sprouts.

By: Carlotta Lucas

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