Explore Plants

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
    
 

Can't find the answer in our existing FAQs, submit a question to Mr. Smarty Plants.
Need help with plant identification, visit the plant identification page.

rate this answer
2 ratings

Wednesday - September 30, 2009

From: Round Rock, TX
Region: Southwest
Topic: Compost and Mulch, Soils, Herbs/Forbs
Title: Blackfoot daisy turning brown in Round Rock, TX
Answered by: Barbara Medford

QUESTION:

A few days ago, our blackfoot daisy was doing wonderfully. Then we got heavy rains and suddenly the plant is sere and brown. Did the too wet weather do this, and will it come back next year?

ANSWER:

When a native plant like Melampodium leucanthum (plains blackfoot) suddenly begins to suffer, you have to ask yourself what in the environment has changed to cause this problem? Here are the Growing Conditions for blackfoot daisy, which is definitely native to Central Texas:

Water Use: Low
Light Requirement: Sun , Part Shade
Soil Moisture: Dry
Soil pH: Acidic (pH<6.8)
Soil Description: Dry, rocky, calcareous soils. Rocky, Gravelly Sandy, Limestone-based, Caliche type
Conditions Comments: Blackfoot daisy is a sturdy, mounding plant, that will flourish in rock gardens. It is heat and drought tolerant. Good drainage is essential to its success. In late winter, older plants can be cut back halfway to keep them compact. Rich soil and abundant water will likely produce many more flowers in the short-term, but may consequently shorten the lifespan.

The things that jump out at us are the low water requirement, the need for good drainage and the preference for acidic soil. The soil in Central Texas is generally pretty alkaline, but your plants have been okay with that up to now. Goodness knows, we have had low rainwater for the last two years, and apparently the plant was good with that. It looks as though the drainage is the key. As long as we had no rain and you were watering responsibly, the blackfoot daisy was okay. Now, there is rainwater, which you can't turn on and off, and  water is likely standing on the roots of the plant. The best solution for that is to amend the soil with compost or some other organic material, which will improve the drainage. You will notice from the preferred soils for this plant that they are all good at draining. Possibly the soil in your garden is clay, or clay-based, which doesn't drain well at all. If you're up for it, you could even try taking some plants out, and quickly work compost into the soil, returning the plants before the roots have time to dry out. We can't say if this will save your present plants. We would recommend trimming off the upper 1/4 to 1/3 of the affected plants (after you return them to the soil, if you decide to go that route), treating them as though they had transplant shock. As we go toward winter, perhaps getting more rain, the plants will all go into semi-dormancy or even die back to the roots, to re-emerge in the spring. Even if you lose those daisies now, you will have improved the long-range vitality of your garden. And, the level of acidity should be changed by the addition of organic materials.

From our Native Plant Image Gallery:

 

 

More Herbs/Forbs Questions

How to deal with wild verbena.
April 07, 2010 - Hello. I have a great 9 acres of black dirt in Dripping Springs! However now that I have cleared cedar, and then w/the great rains came...I am being taken over by wild verbena. (purple)..looks like wi...
view the full question and answer

Texas natives to plant in July and August
July 23, 2008 - My husband and I have a disaster of a lawn that we were planning to develop slowly, over time, with a sustainable design we contracted from a landscape designer. However, we are having to move out of...
view the full question and answer

Native aparejograss and Water-cress at a spring in Horeshoe Bay TX
February 24, 2012 - AT a small spring that seeps from a rocky hill on my ranch near Austin, a stringy grass called aparejograss has replaced the watercress that used to be there. Should I be worried? Does the appearance...
view the full question and answer

Plant ID from Woodcreek TX
January 27, 2012 - I would like to attach a photo of a weed in my lawn and have you identify it. How do I send a photo? I have been told it may be ground ivy. Please tell me how to kill it without damaging the lawn.
view the full question and answer

Plants for steep slope in Pittsburgh PA
April 25, 2013 - I have a similar question to one from SC. I live in Pittsburgh, PA. We have a steep slope behind a newly built in pool. What type of plants can I put on the hillside to hold the soil. It gets a ...
view the full question and answer

Smarty Plants's Facebook profile Support the Wildflower Center by Donating Online or Becoming a Member today.

Mr. Smarty Plants wants you to be his Facebook friend. Click the Facebook icon to add yourself to Mr. Smarty Plants list of friends.