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
3 ratings

Monday - June 30, 2008

From: Walnut Creek, CA
Region: California
Topic: Non-Natives, Transplants
Title: Decline of non-native Star Jasmine in California
Answered by: Barbara Medford

QUESTION:

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 there has been little new growth lately. Please help save our jasmine!

ANSWER:

The first thing that comes to mind is transplant shock, since you only planted it a month ago. This is something people overlook, as they buy a fresh, blooming plant, stick it in the dirt, and it suddenly droops. The most important thing: is there good drainage in that redwood planter? In other words, when you water, does water come out through drainage holes? Nothing will wipe a plant out sooner than standing in water. Once you've examined the drainage, here are some things to consider. The Star Jasmine, which is a native of China, needs a year or two to get a good root system going. Also, it blooms in April and May, ordinarily, and should bloom only sporadically the rest of the year. It is fully hardy in USDA Hardiness Zone 8, in a sunny location. The best we can tell, Contra Costa County, in the north central coastal area of California, is Zone 8, so it should be fine. Now, to deal with the transplant shock. Prune off the upper 1/2 to 1/3 of the plant, and trim out any crowded vines that are not looking well. This will give the as-yet undeveloped roots a little breather, with less upper growth to get water and nutrition to. Then, use a slow drip to water, sticking a hose in the planter, and just let it dribble (watching the drainage) until it seems all the soil is moist. You need to check the soil, and repeat this fairly frequently. Planters will dry out faster than plants in the ground, because they are exposed on all sides but the bottom to the air. Removing those leaves from the upper part of the plant will also help in preventing moisture loss by transpiration. Early next Spring, before blooming time, give it some fertilizer with a good proportion of phosphorus in it, to encourage blooming. And be patient!

This University of Florida Cooperative Extension website Trachelospermum jasminoides will give you more information.

 

More Non-Natives Questions

Trees for shade in Austin
May 20, 2012 - I live in Austin and I am looking for a good tree to plant under a large live oak I have in my backyard. Something slow-growing of course and, the garden only gets late day sun for about an hour. Filt...
view the full question and answer

Problems with non-native tomatoes from Spokane WA
August 18, 2012 - I have 2 tomato plants in 1 whiskey barrel, they are in abundance with tomatoes. My problem is when the tomatoes start to ripen, half green & half light red within 1 day the tomatoes are really soft ...
view the full question and answer

Aging non-native weeping willow in Ohio
June 11, 2008 - We had a weeping willow now for about 15 years and it was doing fine until this summer. It has new branches sort of but a lot of the older ones are dying. There are leaves of course and they are sti...
view the full question and answer

Getting Rid of Firecracker Flower
July 16, 2015 - We live in the Tampa area of Florida. We planted Russelia equisetiformis under some palm trees 10 years ago. It has grown deep among the palm tree roots. We want to kill the Russelia without harming ...
view the full question and answer

Invasive, non-native Bryophyllum spp. in Austin
May 13, 2010 - I was given two varieties of what I now believe are 'Mother of Millions' and saw that they're considered a noxious weed in Australia. Are these plants considered dangerous to TX if I keep them in ...
view the full question and answer

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