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Monday - December 15, 2014
From: Corpus Christi, TX
Region: Southwest
Topic: Compost and Mulch, Soils, Watering, Ferns
Title: Calcium from Eggshells for Ferns?
Answered by: Anne Van Nest
QUESTION:
I was reading recently about beneficial additions to the soil/plant. The first was about soaking used egg shells overnight and then pouring the water onto ferns. They said that the calcium in eggshells went into the water left overnight and then if put onto ferns it would make the ferns grow into beautiful plants quickly. Another interesting “fact” was that adding the brewed tea in the bags was a great addition to the soil. So, since I am a avid recycler I save the tea out of the brewed bags & put it into my soil mixture when transplanting new plants or planting seeds. Is there any truth in either of these?ANSWER:
If left soaking overnight, some gardeners believe that calcium is leached from eggshells into the water in quantities that are beneficial to plants. Since many plants need some calcium in the soil for good growth, this is viewed as a way to provide additional calcium for plant uptake. In searching the internet, there are many references to using eggshells this way, or crushing them and adding them to the soil, but I could find no scientific research to prove this procedure is providing additional calcium. Anyway, it is unlikely that doing this will harm your ferns, if you feel strongly about doing this.
Used tea leaves are fine to add to your compost with other ingredients like vegetable peelings, grass clippings, and shredded leaves, and in a moderate amount that satisfies the ratio of carbon to nitrogen needed for good decomposition. Look at the Mother Earth News website for a good article by Barbara Pleasant on making compost.
It’s not a good idea to just use a lot of tea leaves when planting seedlings as there may be porosity and nutrient issues if too many tea leaves are close to the seedling roots. Regular seeding potting soil has a more porous texture that will allow for healthier root growth and often contains a better ratio of the nutrients needed by young plants. Small amounts of tea leaves can be incorporated into regular potting soil when transplanting larger plants though. Also tea leaves will work well for other tasks such as using them as a mulch on the surface of the soil for container or perennial plants and shrubs to conserve moisture.
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