En Español

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
1 rating

Monday - July 06, 2009

From: Lake Ronkonkoma, NY
Region: Northeast
Topic: Compost and Mulch, Propagation, Transplants, Herbs/Forbs
Title: Dividing blackeyed susans in Lake Ronkoko NY
Answered by: Barbara Medford

QUESTION:

How are you supposed to divide blackeyed susan's? And when is the best time to do this?

ANSWER:

The only plant we found with the common name "Blackeyed Susan" native to New York is Rudbeckia hirta var. pulcherrima (blackeyed Susan). According to the information in our Native Plant Database, this is a biennial, which may perennialize if it's happy where it is. So, we're going to go on the assumption that your plants are happy, and suggest you divide them in early fall in your climate, preferably after the first cool nights, but when the soil is still warm. The plant will be going into dormancy then and won't be quite so subject to transplant shock. You can spend some time between now and then preparing their new home, possibly adding some compost and working it in to improve drainage and to help make trace nutrients in the soil more available to new roots. 

We found an excellent website by Fine Gardening, 10 Tips on Dividing Perennials, which gives you information in a much more organized form than we could. 


Rudbeckia hirta var. pulcherrima

Rudbeckia hirta var. pulcherrima

Rudbeckia hirta var. pulcherrima

Rudbeckia hirta var. pulcherrima

 

 

 

More Transplants Questions

Peeling bark on red oak in Plano, TX
April 08, 2010 - I have a red oak that was planted 2 years ago. The trunk is approx. 5 in around. The bark around the bottom of the trunk is peeling off. At first we thought it was rabbits so we put some rabbit gua...
view the full question and answer

My newly planted Redbuds are not doing well.
June 24, 2009 - I ordered and received 2 Red Bud trees from one of the popular ordering houses. They explained that they were dormant and not dead, and gave us instructions on how to plant them, which we followed. Th...
view the full question and answer

Transplanting of non-native Vitex
April 29, 2006 - I live in El Paso and have a fifteen year old vitex tree planted too close to a mesquite tree in my backyard. As a result of this, the vitex has failed to thrive. My question is this: can I replant ...
view the full question and answer

Decline of non-native Star Jasmine in California
June 30, 2008 - We just had 2 trachelospermum jasminoides planted in a redwood planter box about a month ago. We can't figure out if we are watering too much or too little but some leaves are turning yellow and the...
view the full question and answer

Volunteer bluebonnets in Farmville VA
May 17, 2010 - I have two small Texas bluebonnet plants that came with no instructions as to how to plant them regarding soil or sun. Everything I read has to do with seeds, can you please help me? Thank you.
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | JOBS | SITEMAP | STAFF INTRANET
© 2016 Lady Bird Johnson Wildflower Center