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My Two-Ingredient Seed Raising Mix

Now the cooler weather has arrived, I have been getting busy in the greenhouse.

Until fairly recently, my seed raising success has been patchy at best.



Seeds used to really intimidate me in the garden.

I really couldn’t be bothered. And I was a bit impatient. It was just far easier to buy punnets. But, before long, I wanted varieties that just weren’t grown by the punnet distributors.

If I wanted to grow the interesting stuff, it had to be from seed.

Besides, punnets are expensive

Eight plants for $3.00 or a packet of 1000 seeds for the same price. You don’t have to be an economic expert to figure out that math!

Plus, heirloom varieties, with some careful planning, return seed to you year after year.

Clearly, growing from seed is much better value.

When starting with seeds a few years ago, I sought the advice of a well-known nurseryman.

“Just dig up some soil you are planning to plant them in” he said. “And stick ’em in that. If they’re not going to grow in that, you’re buggered the minute you transplant them anyway.”

And because there was some truth in his reasoning, I gave it a go.

The problem was, my soil was effectively beach sand.

It offered no nutrient, compacted in the pot and was water repellant.

Not much other than nasturtiums survived that experiment.

I began researching and experimenting with my own DIY seed raising mixes.

I blended peat moss, coarse river sand (yes, despite being surrounded by sand, can you believe I was encouraged to buy the “right” sand), carefully sifted compost & worm castings and a handful of blood and bone for good measure.

This worked much better than my beach sand soil!

But, I still had a few problems.

It took forever to prepare and mix.

It was expensive.

My sifted compost introduced dozens of uninvited seeds, making it hard to determine if indeed the right plant was showing up in the pot, or if it was an impostor. Often, there were a number of competing plants springing up in the one seedling pot.

I even suspected the compost worms introduced into my mix snacked on the germinating seeds.

Try again, and again!

I reckoned I didn’t really need a super-duper nutritious mix.

Seeds have their own sprouting food source in the germ of the seed itself.

What they need is warmth, and soil that isn’t going to get waterlogged, or dry out too fast.

Seed raising mix has to be friable enough for delicate roots to penetrate.

Not too expensive would be nice too.

Plus, it has to be easy for me to mix, and good for the soil I will eventually plant into.

Finally, we have a seed raising mix winner!

After a few more experiments, I have found the winner! And it couldn’t be simpler. Two ingredients.

My Never-Fail-Two-Ingredient Seed Raising Mix

You will need

  • 1 measurement of reconstituted finely shredded coir fibre.
  • 1 measurement of vermiculite. (I buy mine in big bags from the pet store.

It’s MUCH cheaper than getting it from the garden centre or hardware store.)


  • Mix thoroughly.
  • Done.

Too easy, right?

It’s good in punnet trays, my little paper pots and of course, my seedling bags.

It holds it’s water without getting soggy and is free draining. It works a treat. I only plant with freshly mixed seed raising mix.

No chance of contamination. The seedlings that show up are the ones I want to see.

Purple broccoli, tomatoes and lettuce all love this mix!

In fact, they love it so much, you can see I have a bit of thinning to do before I plant. Since using this mix, I have become more conservative with the number of seed I sow. My germination rate is much improved.

When the seeds start to grow their second set of leaves, I water them with diluted worm wee to boost them with some nutrient and bacteria before they make their way out into the big wide space that is my veggie patch.

I save my compost for my actual garden soil or potting mix.

My seedy success has just sky-rocketed with this awesome two-ingredient seed raising mix!

I urge you to give it a try.

I can easily lose track of what I have sown and when! So I have created a Seed Sowing Record Sheet. You receive your FREE copy when you Subscribe! Plus, you’ll get access to the A Farm of Your Home Subscriber Resource Library. Simply enter in your VIP password and you’re in!

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What do you use for seed raising mix? Have you tried this mix before? Please leave a comment below, I would love to hear from you.