It’s nearly seed starting time! Can you feel the excitement in the air? Oh Joy 😊 It’s so fun to be thinking about and planning this year’s garden. Each year it gets a little easier as some things become more habitual and I figure out little tricks to challenges I encountered before.

Something I wanted to do this year as a little test was make my own seed starting mix (#makeitmyself, #MIM). Last year I used the Miracle Gro® seed starting potting mix and it turned out really well. And that might lead one to say “Well, if it ain’t broke, don’t fix it.” But, I’m not entirely sure what is in the mix and I like to know what I’m growing my vegetables in.

Before I go further, there is one important point about seed starting to remember. You can’t just go outside and shovel a bunch of dirt into a bucket and bring that in your house. I know, this didn’t make much sense to me either when I learned it. Afterall, when I direct sow, I’m not creating a bunch of little holes of different ingredients before I sow the seed. But typical soil is going to be too dense, likely have a bunch of weed seeds, of course pests, and possibly disease. That’s just a much harder start than your little baby seedlings need.

Instead, it’s important to use a seed starting mix that is light and well aerated to allow you to control the moisture levels and drainage, sterile meaning there is no fungus, mold or viruses, and ensures strong root development for proper nutrient absorption.

Ingredients to Use:

You may find lists of 7-10 ingredients that go into seed starting mix. From the numerous articles I’ve read, there are really only three items common to all recipes so that’s what I’ve chosen to use. It’s the “no frills” version and it works just fine.

1. Peat Moss OR Coco Coir – peat moss comes from peat bogs whereas cooc coir made from the husks of coconuts and is a much more sustainable alternative to peat moss. From a price standpoint, they are pretty comparable so I don’t see any reason to not use it. I had leftover peat moss from last year and will only be buying coco coir going forward.
2. Perlite – a volcanic glass that helps your soil stay light, prevents compaction, and promotes moisture retention.
3. Vermiculite – a mineral that is highly absorbent, improves aeration and moisture levels, and will help your little seedling absorb nutrients.

Steps to Follow:

• Your ratios are 6 parts coco coir to 2 parts perlite and vermiculite (6:2:2). As an example, if you took 1 coffee mug from your cabinet and filled it 6 times with coco coir, you would then fill it 2 times with perlite and 2 times with vermiculite.
• Mix it up well with your hands in a bucket or plastic storage bin.
• Then add enough boiling water to thoroughly wet the whole mix, and then let it cool to room temperature. Caution: it will be hot when you add the boiling water so wear garden or kitchen gloves.
• Then just fill your seed trays or pots that you plan to use with the mix.

The big win from starting your own seeds and making your mix is you have complete control over everything that goes into the process and don’t have to rely on whatever your garden store offers.