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

Friday - November 03, 2006

From: Safety Harbor, FL
Region: Southeast
Topic: Diseases and Disorders, Herbs/Forbs
Title: Problems with sunflowers in Florida
Answered by: Nan Hampton and Joe Marcus

QUESTION:

I planted sunflowers on the west side of my house where I have previously planted them and they grew wonderfully. These new ones, however, seem to be dying, (less than 2 weeks). I bought the plants at the store, put potting soil in the holes and then the plant. I have also used milorganite, as I have used it in the past with wonderful results. Can I just trim the sunflowers to get new growth or are they a lost cause? My gerbera daisies are doing a little better, but not much. What can I do to bring these two plants back?

ANSWER:

Let's consider the possible causes for your plants not doing well:

1. They haven't received enough water.

From your concern about their care, I would think that you had given them sufficient water.

2. They are stressed from too much water.

This is not likely the cause since Florida's sandy soil drains well even if you applied too much water for them.

3. They were overfertilized.

It would be difficult to overfertilize with milorganite.

The most likely cause is that your plants were stressed from something that occurred before you bought them. You can try pruning away the dead foliage from the sunflowers and the gerbera daisies, but it is a little late in the season even in Florida for sunflowers to recover and do very well.

 

More Diseases and Disorders Questions

Problems with hibiscus tree in Wichita Falls, TX
November 10, 2008 - My Hibiscus trees have black spots on the leaves. What might this be and what is the remedy?
view the full question and answer

Problems with fruit of Mexican Plum from McKinney TX
May 19, 2013 - MY Mexican plum tree (about 5 years old) has small fruit on it. Some of them are severely deformed, and look rotten almost. They are bumpy and ragged looking. Or they are pasty white,rotten and dried ...
view the full question and answer

Control of sooty mold from aphids in Crape Myrtle
February 25, 2007 - I have a crape myrtle in my front flower bed that has a sooty black substance on the leaves and trunk. I've done research and understand this is caused by aphids. My question is how do I get the bl...
view the full question and answer

Leaves wrinkling on Tecoma stans from San Antonio TX
August 16, 2013 - My two year old esperanza (planted in the ground) froze back last winter, came back from the roots & has been doing well all summer. Recently one branch has leaves that are nice & green but very wrin...
view the full question and answer

Determine oak wilt in red oaks
December 12, 2007 - I am concerned my red oaks have oak wilt. How can I tell what is wrong with them?
view the full question and answer

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