Welcome to my Backyard Gardening series, where, over the next few months, we will walk through simple steps that can help anyone grow more food at home, starting with one of the most important stages, getting seeds to germinate and grow into strong seedlings. If you’ve ever sown seeds and watched them do nothing, rot, or produce seedlings thin like sewing thread, trust me, you’re not alone. For years, I thought the problem was the batch of seeds. It turns out the issue was the medium (the ‘soil’ in which I was planting them).
Seedlings don’t need rich soil at first because the seed already contains food stores that supply energy for the young plant until it produces its first set of true leaves. So, you really don’t need to stress about nutrients at the beginning.
What seedlings need most is the right soil structure so they can push up through the surface easily and develop healthy roots. A good seed-starting mix should be light and well-draining, allowing tiny roots to breathe and grow. At the same time, it must hold enough moisture to support germination without staying soggy. The texture should also be fine so small seeds can push through the surface easily.
One of the most accessible materials for this in Jamaica is coco coir. Coco coir holds moisture well, drains properly, and is widely available locally. Here is a simple seed-starting mix recipe anyone can use:
• 2-parts coco coir
• 1-part sieved compost (this is basically decomposed leaves and food scraps that have turned to soil.)
• 1-part sharp sand or perlite (for drainage)
Now you may be wondering, “Why can’t I just use soil from my yard?” The problem is that garden soil usually becomes compacted in seed trays, drains poorly, and can carry disease organisms. When these conditions combine, seeds may struggle to germinate and seedlings that do emerge can suddenly collapse at the soil line. This condition is known as “damping-off”, a common disease that thrives in overly-wet soils and poor airflow.
THE SWEET SPOT
Another important factor when starting seeds is moisture. The mix should not be too wet, because excessive moisture can cause seeds to rot. On the other hand, if the mix is too dry, it becomes difficult for water to penetrate and activate the seed. So, what is the sweet spot? The mix should contain enough moisture that when you squeeze a handful, only one or two drops of water come out. If water drips freely, the mix is too wet. If nothing comes out, it is too dry.
Water is critical for germination because every seed must absorb it before the chemical reactions that begin the growth process can start. Germination is simply the process where growth inside the seed causes the baby plant to emerge from the soil. Once your seed-starting mix is ready, you can begin filling your seed trays or planting containers.
Here is a small tip that makes a big difference when filling the containers. When you think the container is full, it probably isn’t. Tap the tray gently on a firm surface, and you will see the mix settle, creating extra space. Add a little more mix to fill that space before sowing your seeds.
After sowing, always water gently. A light mist from a spray bottle or a watering can with a fine nozzle works best. The water should flow through at a moderate rate, showing that the mix drains well. Avoid heavy watering because strong streams of water can wash seeds out of position and bring them to the surface where they may fail to germinate.
HOMEWORK
Sow one set of seeds using your usual method and another set using this lighter, well-draining mix. Label both trays and give them the same care. After two weeks, compare the results and see which performs better. I believe the seed-starting mix will outperform the other batch, but let’s see what the experiment reveals. Feel free to share your results with me at freedomcomerain@gmail.com.
My next article will look at the sowing details that can transform your results, including different seed planting depth, spacing, and light requirements.
Until next time…
LET’S GET PLANTING!
Claudelle Maitland Wilson has been saved for the past five years. She is an agroforester who works with Jamaica’s farmers in strategically using trees to improve their farm output and income. An organic back-yard farmer herself, her passion is to help persons establish their own vegetable gardens.