Contact Us Host an Event Volunteer Join

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

Saturday - March 30, 2013

From: Gilbertsville , PA
Region: Mid-Atlantic
Topic: Diseases and Disorders, Trees
Title: Is yellow tulip poplar alive from Gilbertsville PA
Answered by: Barbara Medford

QUESTION:

How can I tell if my yellow tulip poplar is alive? thank you

ANSWER:

The best way to tell if any tree or woody plant is alive is the thumbnail test. We are assuming that your Liriodendron tulipifera (Tulip tree) has put out no leaves nor blooms; it ordinarily blooms green, yellow and brown from April to June. If you follow our plant link to the webpage on your tree you will find these growing conditions:

"Growing Conditions

Water Use: Medium
Light Requirement: Sun , Part Shade , Shade
Soil Moisture: Moist
Soil pH: Acidic (pH<6.8)
CaCO3 Tolerance: Low
Soil Description: Rich, moist soils.
Conditions Comments: Tulip tree is insect and disease free. It is intolerant of compacted soil and should not be placed in confined beds or planters near pavement. It grows very rapidly in deep, rich well-drained soils with uniform rainfall. Dry summer weather causes physiological problems. Tulip tree drops its foliage in response to drought and is somewhat weak-wooded."

According to this USDA Plant Profile, your tree does grow natively in Montgomery County in southeast Pennsylvania.

Now, the thumbnail test. With your thumbnail and beginning at the highest branch you can reach, make a very thin scraping of the outer bark. If there is a very thin layer of green beneath that outer bark, that branch, at least, is alive. If there is no such green layer,  continue farther down the tree in search of the green. If you can't find any, even down close to the roots, that tree is dead.

Okay, you probably want to know what it died of (if it is, indeed, dead). Honestly, we don't know, but here is a website from the Missouri Botanical Garden on the tree with some infomation on problems and diseases.

 

From the Image Gallery


Tulip tree
Liriodendron tulipifera

Tulip tree
Liriodendron tulipifera

Tulip tree
Liriodendron tulipifera

More Diseases and Disorders Questions

Failure to thrive of Esperanza in Houston
July 07, 2009 - Esperanza plant. I have 3 of these plant in my flower bed for the last 10 years. They get west sun. Over the last three years they have bloomed initially but then the new growth is deformed. The best...
view the full question and answer

Leaves browning on non-native willow from in Cumbla PA
July 10, 2011 - We recently planted a willow tree. A lot of the leaves turned yellow and some turned brown, but it is also getting some new buds. my question is, should I take the dead leaves off or leave them there...
view the full question and answer

Failing to thrive of non-native rose bushes in Austin
September 24, 2012 - I live in NW Austin and I have lost one knockout rose bush this summer and it looks like another one is failing. The leaves on a cane turn yellow then brown. I do not see whiteflies or black spots o...
view the full question and answer

Blackening of top growth of yaupon in Sunrise Beach TX
June 09, 2010 - My question regards a Will Flemming yaupon which I am thinking may be within your scope of expertise. These were recently planted under windy conditions, then hit with a neighbors antiquated jet type ...
view the full question and answer

Spots on non-native naval orange trees from Stockton CA
October 20, 2012 - I have two mature Navel Orange trees. One tree has developed spotty chlorophyl depleted areas that were not on the oranges when they were smaller. In addition, the oranges on both trees are smaller ,...
view the full question and answer

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