Host an Event Volunteer Join Tickets

Support the plant database you love!

Q. Who is Mr. Smarty Plants?

A: There are those who suspect Wildflower Center volunteers are the culpable and capable culprits. Yet, others think staff members play some, albeit small, role. You can torture us with your plant questions, but we will never reveal the Green Guru's secret identity.

Help us grow by giving to the Plant Database Fund or by becoming a member

Did you know you can access the Native Plant Information Network with your web-enabled smartphone?

Share

Ask Mr. Smarty Plants

Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.

Search Smarty Plants
See a list of all Smarty Plants questions

Please forgive us, but Mr. Smarty Plants has been overwhelmed by a flood of mail and must take a break for awhile to catch up. We hope to be accepting new questions again soon. Thank you!

Need help with plant identification, visit the plant identification page.

 
rate this answer
Not Yet Rated

Thursday - September 24, 2009

From: Greenport, NY
Region: Northeast
Topic: Herbs/Forbs
Title: How to use seaweed for mulch and fertilizer
Answered by: Nan Hampton

QUESTION:

Dear Mr. Smarty Plants,I live on the Peconic Bay, Greenport, Long Island. We have an oyster farm and lots of seaweed. I've read that seaweed was used on farms in the past as mulch (fertilizer?). I would like to mulch my plants and trees with seaweed - what type of seaweed and what is the process? Thanks for the info.

ANSWER:

Mr. Smarty Plants lives a little ways from the ocean so doesn't have direct access to seaweed, but he knows it does make an excellent fertilizer and mulch.  First of all, the Irish have been using seaweed for fertilizer for hundreds of years and also use it for food, making cosmetics and many other applications.  You can read about the history of seaweed uses in Ireland from the Irish Seaweed Centre.  You can make a liquid fertilizer from the seaweed to put on your plants or you can simply place the seaweed on the ground as a mulch around the plants. You can find numerous recipes for making your own liquid fertilizer on the internet—here is one from eHow.com and here is another.  In Seaweed Comes Ashore from Organa Horticultural there is a description of its use as mulch, fertilizer, and pest control and how it enhances growth in plants.  Ascophyllum nodosum (knotted wrack) is a common seaweed along the northeastern Atlantic coast and is likely the seaweed you have in your oyster farm.

 

 

More Herbs/Forbs Questions

Appearance of Viola lanceolota after controlled burn
March 28, 2009 - Oh Great Green Guru, I just recently found Viola lanceolota (bog white violet) on a portion of Brazos Bend State Park’s prairie that was burned about 2 months ago to control for woody growth. (I wou...
view the full question and answer

What about the Bluebonnets at Muleshoe Bend Recreational Area in Spicewood, TX ?
April 27, 2015 - We had heard about vast field of bluebonnets out at Muleshoe Bend Recreation Area - an LCRA park in Spicewood. We went out today and there are indeed vast fields . . . all where Lake Travis would be ...
view the full question and answer

Ridding property of Dichelostemma Firecracker Plant from Cleburne TX
April 11, 2012 - How do we get rid of Dichelostemma-Firecracker plant? It has invaded our yard & we hate it! How do we kill it?
view the full question and answer

Combining yellow columbine and Malvaviscus arboreus
March 07, 2008 - Can yellow columbine coexist peacefully with Malvaviscus arboreus? I have a nice stand of the former and would like to plant the latter to take over when the columbine starts to look ratty in the hea...
view the full question and answer

Short, Shady Plants for South Carolina
February 24, 2015 - I have a shady part of my mother's garden that doesn't drain very well. Do you have any suggestions as to what type of flowers or plants (preferably native to S.C.) that aren't red that might grow ...
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.