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
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
1 rating

Saturday - July 27, 2013

From: San Diego, CA
Region: California
Topic: Propagation, Seeds and Seeding, Shrubs
Title: Weak flowering on rosa minutifolia from San Diego CA
Answered by: Barbara Medford

QUESTION:

Hi, I have a Rosa minutifolia and has been doing great, but when it gives flowers the petals fall too fast, only last a day or two and also the fruit never forms completely and finishes drying so I can't get seeds. What can I do? The plant receives indirect light the most of the day, and 3 hours of direct light approximately. It is not under typical water-stress of the summer, I water it regularly to keep it out of dormancy. Thanks for the advice

ANSWER:

From Calflora, here is Taxon Information on Rosa minutifolia. According to this USDA Plant Profile Map, it is native only to San Diego County in North America. Although the USDA is our source for material in our Native Plant Database, the map is all we can find in the USDA database, no information on whether it is native or introduced, etc. So, we have nothing in our database on it. We do know from the Taxon Information (above) that it is considered endangered, but not whether it is officially classified as native to North America. The best information we found on the plant was in the Las Pilitas Nursery website.

From the Las Pilitas Home Page:

"Since the 1970's Las Pilitas Nursery has been combining research and California native plants. We do the work, you get to play with the plants and enjoy the resulting web pages."

So, we will accept their word that this is a native plant to North America, but so far we still have found no information on growing conditions that might give us a clue to the answer to your question. The California Coastal Rose Society has a long article on it, but it infers more that the plant is disappearing altogether than that it has trouble retaining  blooms long enough to seed.

From helpmefind.com on 'Rosa minutifolia Englemann':

"USDA zone 9b and warmer.  Can be used for specimen.  Benefits from winter protection in colder climates.  drought resistant.  prefers dry climates.  prefers full sun.  prefers warmer sites.  Do not prune."

Perhaps it is getting too much water and not enough sun, both of which can inhibit blooming in a rosa genus. Be sure and not sprinkle the leaves to water, as this is conducive to mildew, which could also be causing petal drop.

 

 

More Seeds and Seeding Questions

Seeds for India from Guilderland NY
August 15, 2010 - I have Green Cross “Non Profitable” trust in TamilNadu India. We are looking for free seeds from Government and other NGO foundations. Moto: Global Vowing awareness program and our volunteers help ...
view the full question and answer

Viability of Lupinus havardii seeds from Elmendorf TX
April 25, 2014 - I have been able to grow several Lupinus havardii (Big Bend Bluebonnet) and they are now making seed. Is there anyway to determine if a seed is good or bad for this plant?
view the full question and answer

Creating a bluebonnet patch between Brenham and Houston.
April 12, 2009 - I am creating a Bluebonnet patch in a well-drained section of my flowerbed. I just planted the plants (it is now early April and I'm between Houston and Brenham, TX). I plan to let them go to seed ...
view the full question and answer

Planting bluebonnets
April 20, 2008 - How long do bluebonnet seeds take to mature, and when is the earliest in their development they can be harvested? When can they be scattered?
view the full question and answer

Which seeds need to be scarified from Marble Falls TX
November 08, 2013 - Can I find out which seeds need to be scarified?
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.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP
© 2014 Lady Bird Johnson Wildflower Center