As an experienced gardener and landscaper, I can provide some insights into how long seedlings should stay covered. When it comes to using domes, they are primarily used on trays to create a mini greenhouse effect and promote seed germination. However, it’s important to note that once the seeds have germinated and the seedlings have emerged, they should not be kept covered for too long.
The purpose of using domes is to provide a warm and humid environment that encourages seed germination. The trapped moisture and heat help to speed up the germination process. However, once the seeds have sprouted and the seedlings start to grow, they require ample air circulation and exposure to light for healthy development.
Leaving the domes on for an extended period can actually be detrimental to the seedlings’ growth. The lack of airflow can lead to excessive moisture and create a breeding ground for fungal diseases. Additionally, the seedlings may become weak and leggy as they stretch towards the limited light source.
The duration for which seedlings should stay covered varies depending on the plant variety and germination time. Some fast-growing plants may only need a few days under the dome before they start to emerge. On the other hand, slower-growing varieties may require a bit more time.
To determine when to remove the domes, it’s essential to monitor the progress of your seedlings. Once you notice the first signs of green shoots or leaves breaking through the soil surface, it’s a good indication that germination has occurred. At this point, you should remove the domes to allow for proper air circulation and light exposure.
It’s important to mention that even after removing the domes, seedlings still need some protection from harsh conditions. Gradually acclimating them to the outdoor environment is crucial to prevent shock. This can be done by gradually increasing their exposure to outdoor conditions over a period of time.
The duration for which seedlings should stay covered with domes is relatively short. Once the seeds have germinated and the seedlings have emerged, it is best to remove the domes to promote healthy growth. Remember to monitor the progress of your seedlings and provide them with the necessary care and protection as they continue to develop.
