Growing and Sowing Indoors: That’s How It Works!


Growing indoors is understood to mean growing plants in a greenhouse or in a low cultivation tunnel, or pre-sowing indoors and growing them in a greenhouse or in propagation pots.

There are several advantages to growing in a greenhouse:

This way you can enjoy certain flowers, vegetables, and herbs sooner or later.
You can also sow or grow plants earlier than outside.
In addition, you can grow crops in a greenhouse that normally cannot grow in our climate.

If you do not have a greenhouse, you can be pre-show flowers, vegetables, or herbs indoors in a greenhouse from March-April. This has the advantage that the plants are already larger and stronger when planting out than if you were to sow them directly in the garden.


When you start growing indoors depends on your goal. Do you want to grow indoor tropical varieties, for example? Then you can do this all year round. If you want to use your greenhouse, low foil tunnel, or greenhouses to extend the seasons and enjoy your flowers, vegetables, or herbs earlier or longer, then it differs per type when you start. You will always find this information on the packaging of the seeds and in the sowing calendar: some plants can be pre-sown in February, but for most, it is better in March or April. Always check the seed calendars v ear g r oente , Kru id, and flowers and also check the packaging; gen to make sure you’re in the right place. Here you can also read what the required temperature and light requirement as per type. Then you immediately know how warm you need to keep the greenhouse and how much light you need to provide.


Do you want to pre-show indoors or in a greenhouse to plant out the plants outside later? Then you can make good use of greenhouses and propagation pots. A greenhouse or indoor greenhouse is a plastic container with a translucent hood, which often also contains ventilation grilles. Place this in a sunny spot, so that your seedlings get enough heat and light. You can place a greenhouse both indoors and in your greenhouse, as long as they get enough light. You can also opt for a greenhouse with heating, if a higher temperature is needed, or if the temperature inside the house still varies too much.


Grow pots are also useful for growing seeds. Grow pots are available in all sizes; There are square nursery pots in strips where you can sow large seeds directly, but also round cultivation pots where you can transplant your seedlings to further cultivate them. You can choose plastic pots or biodegradable pots. Biodegradable fiber jars are not only environmentally friendly but also very convenient. Because you can easily plant the plant with the pot and all in the garden or in a larger pot. The propagation pot will digest by itself in the soil. They are ideal pots for those who want to garden organically.


A greenhouse or conservatory is extremely versatile. You can use it for pre-sowing, but also to grow crops that do not do well in our country in the open ground. Glass greenhouses are optimal for growing. They let a lot of light through and the temperature can be regulated well, so you can create an optimal climate. And don’t forget, you extend the garden season with it. After all, the plants in a greenhouse start to grow earlier in the spring, and at the end of the season, you can continue to harvest longer from a greenhouse.

If you are going to grow crops in a greenhouse, keep in mind that the crop is rotated. By alternating different types of crops every year, you prevent specific shortages in the soil in one place. The soil in the greenhouse can also become depleted. Therefore, replace the top layer (10 cm) of soil in the greenhouse every year.


Just like in a greenhouse, you can start sowing and growing plants in a low foil tunnel early in the spring. Such a growth tunnel made of foil is very handy and easy to install yourself. If you want to protect your vegetables in the vegetable garden against night frost and strong wind, you can do so with a growing tunnel made of non-woven cloth. Non-woven cloth allows air, water, and light to pass through, which ensures that the plants remain protected, but, for example, will not mold so quickly. A mesh tunnel protects your crops against insects or, for example, birds. The advantage of a low cultivation tunnel is that you can easily remove it as soon as the weather conditions are good.


You can pre-sow many annual flowers indoors. The advantage is that the plants are less vulnerable by the time you can plant them in the garden. These pre-sown annuals will also flower earlier than if you only sow them outside in the garden in April-May. Examples of flowers that you can sow well: marigolds, carnations, asters, and snapdragons. You can pre-sow these in March-April in an indoor cultivation greenhouse or in a greenhouse. Some tips for sowing the flower:

Use a greenhouse or propagation pots for sowing.

When the seedlings emerge, you will first see two seed leaves. When the first two real leaves appear, it is time to transplant the seedlings; if you wait too long, the seedlings can choke each other.
When the plants have strong stems and good leaves, they can go outside. Only plant them in the border after mid-May – or put them in pots on the patio – because there is still a chance of night frost until then.


You can also pre-sow vegetables and herbs indoors. This is even necessary for some vegetables, such as (garden) beans. Other vegetables that you can sow well are endive, broccoli, cabbages such as kale and cauliflower, but also sun-loving vegetables such as bell peppers and chilies.

Use greenhouses or cultivation pots that you put indoors or in the greenhouse. Are the young plants in the open ground and is frost still expected? Then choose to protect the plants against the cold with a low foil tunnel. The advantage of this is that when the outside temperature is right, you can easily remove the foil and the plants no longer have to be transplanted.


Vigoroot Rootrainer is ideal for growing various vegetables, herbs, and flower seeds. By using the root trainer , the root grows straight down, extra new roots are created because the main root dies, resulting in an extra-rooted plant.


When the plants are strong enough and the temperature is favorable enough, the plants can be planted outside. This is not easy. To get the plants used to the colder outside temperature, you have to harden them off. You can read exactly how to proceed here.


Of course, you also need to water the seeds, seedlings, and young plants that you grow indoors regularly. It seems easy, but this is also a job that must be done with care. For example, too much water can cause the roots of your plants to rot, something you would of course prefer to prevent. Read more about watering here.

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