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Basic Sowing Guide: Everything You Need to Know About Sowing

Zaaien voor je moestuin is een rustgevend werkje

Sowing is perhaps the most wonderful way to bring a garden or vegetable patch to life. Whether you want to grow flowers, vegetables, or herbs, it all begins with that tiny seed. At Plukkers, we have already developed specific growing guides for many varieties, allowing you to know exactly how to sow and care for your favorite crops. You can find these guides here. In this blog, we dive into the basics of sowing and explain important terms and techniques.

The basics: starting indoors or sowing directly?

Starting indoors

You start indoors in your home or in a protected environment, such as a propagator, seed tray, or windowsill. This method is ideal for plants that require a long growing season (like aubergines and peppers), do not tolerate cold temperatures well (like tomatoes), or for expensive seeds you want to have a lot of control over (like kale sprouts or cutting garden flowers). When? Usually between February and April, depending on the crop.

Advantages of starting indoors

  • You get a head start on the season.
  • You can maintain more control over temperature and moisture.
  • The plants are larger when you transplant them. As a result, you are less likely to suffer from pests like slugs eating your mini seedlings. The larger the plants you put in the ground, the less attractive they become. Tiny seedlings just starting to sprout are much more vulnerable.

Tip: Use a propagator to get your seeds to germinate faster. This allows you to grow consistently even in a cold house.

The importance of grow lights

If you are going to start seeds indoors, good light is a real game-changer. Without sufficient light, your seedlings will grow tall in search of the sun but remain limp and weak – we often call these types 'Leggy Larrys'. Fortunately, you can easily prevent that with grow lights!


  • Why use grow lights?
    Grow lights give your seedlings exactly the right light they need to grow strong and healthy. Especially in winter and early spring, when it is often still dark and gloomy outside, grow lights are a lifesaver.
  • How do you use grow lights?
    Hang the lights about 10-15 cm above your seedlings and leave them on for 12-16 hours every day. A timer can be useful so you don't have to keep turning them on and off (at least you won't have to worry about that anymore).

Direct sowing

With direct sowing, you plant the seeds directly into the open ground. This is suitable for crops that grow quickly or do not like being transplanted, such as carrots, radishes, and sunflowers. When? From April/May, as soon as the soil warms up and is no longer frozen. 

Advantages of direct sowing

  • It saves time and materials.
  • The plants develop strong roots right from the start. 

Important terms explained

What does organic seed mean?

Organic seeds are grown without chemical pesticides or synthetic fertilizers. They are often stronger and better adapted to natural conditions. The 'organic' label indicates that the seed meets strict requirements for sustainability and biodiversity. 

Sowing depth

Sowing depth determines how deep you place a seed in the soil. This varies per plant; some seeds need more soil than others. A handy rule of thumb is to plant the seed about twice as deep as the thickness of the seed itself. 

Light, dark, and cold germinators: how they work!

Light, dark, and cold germinators – might sound complicated, but it’s actually very simple once you know how it works!

  • Light germinators love sunlight. So, just sow them on the surface and don't cover them. Press them down lightly so they make good contact with the soil, but leave them in the light to germinate.
  • Dark germinators don't need light to grow; they actually prefer some privacy. Sow them and then cover them with a thin layer of soil so they can germinate in the dark.
  • Cold germinators are seeds that first need a cold period to germinate. In nature, they wait out the winter, but as a gardener, you can mimic this by putting the seeds in the fridge or freezer for a while. After a few weeks, take them out of the cold and sow them in a warm spot. 

Plant spacing and row spacing

  • Plant spacing: The space between individual plants. For example, 30 cm between cabbages.
  • Row spacing: The space between rows of crops. For example, 50 cm between rows of beans.

These distances ensure that plants receive enough light, air, and nutrients. 

Location

The location is the spot where you can best grow the crop. Some plants need lots of sun (for example, tomatoes), while others prefer partial shade (like spinach). Also, check if the soil is suitable; sowing in well-draining soil is a must for many crops. 

Height

The ultimate height of the plant can be important for your planning. Tall crops, such as sunflowers, are best placed at the back of your garden or vegetable patch so they don't shade lower-growing plants.


What do you sow in?

The possibilities for sowing are endless! From classic trays and seed trays to creative reused items – think of empty toilet paper rolls or grape punnets. Anything that holds sowing soil and gets a second life is fine! Take a look around the house; who knows, you might already have your perfect sowing solution lying around.

Holes at the bottom?

Holes at the bottom of your seed tray are very important! They ensure that excess water can drain away, which prevents root rot. Without holes, water often remains, which can be harmful to your seedlings. As an experienced gardener, you might manage without them because you have a good feel for what your plants need. But as a beginner, drainage holes really are the best solution!

Seed trays

We have been sowing in seed trays for years, and it saves so much work during transplanting! The idea is simple: you place one or two seeds per cell or plug, which increases the chance of success. Do both seeds germinate? Then you keep the strongest one – yes, that's sometimes a bit painful, but it's for the health of the plant. The big advantage of seed trays is that you don't have to disturb the roots of your seedlings when repotting, allowing them to continue growing faster!

Potting soil or seed starting soil?

For sowing, it is best to use seed starting and cutting soil, and for transplanting and repotting, use potting soil. Seed starting soil is airier and more permeable than potting soil, which retains more moisture and is richer in fertilizers. That does not mean that sowing in potting soil is impossible; for some plants, like pumpkins and courgettes, it works fine. For more delicate seeds, however, a lighter seed starting soil is usually the best choice.

Ready to get started? 🌱

Do you have everything you need to give your seeds a good start? In our webshop, you will find an extensive range of seeds and growing supplies. Whether you are just starting out or already have experience, we will help you on your way with everything you need for a successful sowing season.


Sowing is a task that requires patience, attention, and love. Hopefully, this simple sowing guide helps you on your way! Don't forget to check out our growing guides for specific tips and sowing inspiration. Happy sowing!

About the blogger

My name is Tom and I am co-owner of Plukkers.com. I am the father of two beautiful daughters and I have a wonderful wife. When I turned a bare spot in the lawn into a herb garden in 2014, I got a very special feeling inside. I immediately felt that it was not a whim but the start of an irresistible and fiery passion. I wanted to know everything and also wrote down what I learned on my website Moestuinweetjes, which is now called Plukkers.com. I also want to inspire other people to grow their own food. At my house in Wielsbeke is my dream garden with a greenhouse, vegetable garden and a hobby vineyard with 333 vines. In addition to wine, I also make delicious beer at home to occasionally celebrate life in moderation. I toast with you to an exciting, richly filled life under the motto: "Make it yourself!"