Cultivating Gardens from Seed SuccessfullyMarch 07, 2012
If you’re starting seeds in a greenhouse planting tray & lid, be sure you know when to keep the lid on and when to take it off. (I’ve provided a photographic timeline later in this post, so skip ahead if pictures are better for you than words.) Lids help keep in moisture and heat, which is a good thing for germinating seeds. Lids can also intensify light on the soil, which is also a good thing for helping warm the soil. But too much of a good thing can be bad.
Once the seeds germinate and send shoots above the soil, its time to begin opening the lid a bit to ventilate. This helps some of the accumulating moisture evaporate, so be sure to check the soil often in case it needs watering. And, getting that bit of ventilation going will also help keep down fungal disease; even the smallest bit of airflow can make all the difference.
Then, once the seedlings begin to get a little height, be sure to remove the lid completely. This will give the young plants room to grow upwards. Ventilation will also be increased. And, shortly, you’ll be potting the young plants into bigger containers or moving them out into the garden.
Following is a visual guide through the various steps I find work really well:
Note: Seed & starts shown here may have originated from seed we purchased &/or seed provided for test growing by Renee’s Garden Seeds, Irish Eyes, Botanical Interests, friends, and others. We have received no compensation from suppliers for this post.