Omar Khalid
Starting seeds under plastic is a common technique used by gardeners to create stable conditions for germination. It is particularly useful for slow-germinating seeds, smaller seeds sown near the compost surface, and seeds that need warmth to germinate and grow, such as tender and half-hardy ornamentals and vegetables. The plastic helps to maintain an even temperature and moisture level, which are essential for seeds to sprout and grow into seedlings. However, it is important to remove the plastic once the seedlings have emerged to prevent root rot and other diseases caused by excessive moisture.
| Characteristics | Values |
|---|---|
| Advantages of covering seedlings with plastic | Maintains an even temperature for germination, keeps the compost moist, protects from frost, damp weather and insect damage, and is inexpensive |
| Disadvantages of covering seedlings with plastic | Seedlings can rot if they're in contact with damp plastic, they can scorch in direct sun, and they can be attacked by soil-borne diseases if covered for too long |
| Types of plastic to use | Cling wrap, freezer bags, clear food wrapping, clear polythene bag, clear plastic bag, glass, propagator lid, clear plastic food tray |
| When to remove plastic | As soon as the seedlings have germinated and are growing out of the compost, or when they push up above the surface |
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What You'll Learn
- Plastic creates a greenhouse effect, maintaining an even temperature for germination
- It's ideal for slow-germinating seeds, smaller seeds, and seeds that need warmth
- Plastic keeps the seedling mix moist, but seedlings can rot if in contact with damp plastic
- Plastic can be reused but must be washed to prevent disease
- Remove the plastic as soon as seedlings emerge to prevent root rot and other diseases
Plastic creates a greenhouse effect, maintaining an even temperature for germination
Plastic wrap or a plastic dome can be used to cover seedlings to create a greenhouse effect. This is particularly useful for slow-germinating seeds, smaller seeds sown near the compost surface, and seeds that need warmth to germinate and grow, such as tender and half-hardy ornamentals and vegetables. The plastic helps to maintain an even temperature and keep the soil moist, which are essential conditions for germinating seeds.
The plastic should be removed as soon as the seedlings have emerged to prevent root rot or other diseases from attacking the seedlings. It is important to check the seedlings regularly to ensure the soil surface is still moist. If the soil needs to be rehydrated, place the covered pot in a shallow tray of water, and the wick effect will draw moisture up.
To create a greenhouse effect, gardeners can use a clear polythene bag, a piece of glass, or clear plastic to cover the pot. Freezer bags, cling wrap, or any plastic can be used as a covering material. Wash and reuse the plastic to prevent disease buildup and reduce waste.
In addition to plastic, gardeners can also use biodegradable plant pots, commonly called Jiffy pots, to prevent transplant shock and reduce plastic waste.
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It's ideal for slow-germinating seeds, smaller seeds, and seeds that need warmth
Covering seedlings with plastic is a great way to ensure stable conditions for your seeds, which is essential for germination. It is particularly beneficial for slow-germinating seeds, smaller seeds, and seeds that need warmth.
For slow-germinating seeds, using plastic can help you pay less attention to them as the days or weeks pass. The plastic helps maintain an even temperature and moisture level, which are crucial for germination. It also keeps the seedling mix moist, which seeds need to thrive.
Smaller seeds sown on or near the compost surface can benefit from being covered with plastic as they tend to dry out rapidly without a cover. The plastic helps keep the compost moist, and with proper moisture levels and average indoor conditions, your pots can stay hydrated for several weeks or even months.
Covering with plastic is also ideal for seeds that need warmth to germinate and grow, such as tender and half-hardy ornamentals and vegetables. It allows you to provide the seeds with the protection and stable environment they need to thrive.
However, it is important to remember that tender seedlings can rot if they come into contact with damp plastic, and they can scorch easily if left covered in direct sun. Therefore, it is crucial to remove the plastic as soon as the seedlings emerge and to regularly check the moisture levels, ensuring the soil surface remains moist.
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Plastic keeps the seedling mix moist, but seedlings can rot if in contact with damp plastic
Covering seedlings with plastic is a great way to keep the seedling mix moist. It is a simple yet effective technique to ensure stable conditions for germinating seeds. The plastic covering helps maintain an even temperature and keeps the compost moist, which is crucial for seeds to germinate. It is especially beneficial for slow-germinating seeds that might not receive regular attention and smaller seeds sown near the compost surface, which tend to dry out quickly without a cover.
To create a plastic covering, you can use a clear polythene bag, a piece of glass, or clear plastic. Freezer bags, cling wrap, or any plastic you have around the house can also be used. Using clear food wrapping is a great way to reuse plastic and prevent it from ending up in landfills. However, it is important to wash the plastic each time to prevent the buildup of diseases.
While plastic helps maintain moisture, it is essential to remove the plastic covering once the seedlings have emerged to prevent root rot and other soil-borne diseases. Tender seedlings can easily rot if they come into contact with damp plastic. Therefore, it is crucial to check the seedlings regularly and ensure the soil surface remains moist without causing excessive dampness.
Additionally, seedlings covered by plastic can scorch if left in direct sunlight, so it is important to monitor their placement and adjust their position if necessary.
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Plastic can be reused but must be washed to prevent disease
Plastic coverings can be beneficial for seedlings, particularly slow-germinating seeds that might otherwise be forgotten and smaller seeds sown near the compost surface, which dry out rapidly without a cover. Plastic coverings help maintain an even temperature and keep the soil moist, which is essential for germinating seeds.
However, it is important to remove the plastic cover as soon as the seeds have germinated and seedlings start to grow out of the compost. Tender seedlings can rot if left in contact with damp plastic and will scorch if left covered in direct sunlight. Therefore, it is crucial to wash and reuse plastic coverings to prevent disease from building up.
There are various plastic covering options available for seedlings. Clear plastic food trays or freezer bags are ideal choices, but any plastic can be used, including cling wrap and food wrapping. Wash and reuse these coverings to be more eco-friendly and prevent disease.
For those wishing to avoid plastic, there are alternative options. Biodegradable plant pots, or Jiffy pots, are a popular choice to prevent transplant shock and reduce plastic usage. Additionally, old yoghurt pots with holes punched in the bottom or tomato and mushroom punnets can be used instead of a seed tray.
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Remove the plastic as soon as seedlings emerge to prevent root rot and other diseases
Starting seeds under plastic is a great way to maintain an even temperature and keep the soil moist for germination. It is especially useful for smaller seeds sown on or near the compost surface, which dries out rapidly without a cover. Plastic wrap is inexpensive, and any plastic you have lying around the house can be used. However, it is important to remove the plastic as soon as seedlings emerge to prevent root rot and other diseases.
Seedlings are sensitive and can be attacked by soil-borne diseases if left covered for too long. Tender seedlings can rot if they are in contact with damp plastic. Therefore, it is important to remove the plastic as soon as the seedlings emerge. This will allow airflow and prevent the seedlings from rotting.
To create a mini-greenhouse effect, gardeners often cover pots with a clear polythene bag, a piece of glass, or clear plastic. This helps to maintain an even temperature for germination and keep the compost moist. However, it is important to remember to remove the plastic as soon as the seeds have germinated and you can see the seedlings growing out of the compost.
It is also important to check the seedlings regularly to ensure the soil surface is still moist. If the soil needs to be rehydrated, place the covered pot in a shallow tray filled with water, and the wick effect will draw moisture up. Wash the plastic each time you reuse it to prevent disease from building up.
By following these simple steps, you can give your seeds the best chance of growing into thriving and productive plants while also preventing root rot and other diseases.
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Frequently asked questions
Covering seedlings with plastic helps maintain an even temperature and keeps the soil moist, creating the stable conditions necessary for germination.
You can use freezer bags, cling wrap, or any plastic you have around the house. Clear food wrapping is a great alternative to sending it to landfill or recycling it.
You should remove the plastic as soon as the seedlings have emerged. Leaving the plastic on longer may cause root rot or other nasty soil-borne diseases to attack the sensitive seedlings.
