Cold tolerance of ligustrum and more on invasives

Seeing the the extreme invasiveness of Ligustrum lucidum (Glossy Privet), I am hoping for a cold winter similar to what we had in Texas 36 years ago, when many were killed. In traveling around to different parks, I see efforts being made to eradicate ligustrum, but it is a difficult one to snuff out and continues to re-seed heavily, so the problem is an ongoing one. In the cold outbreak of 1983-84, temperatures remained below zero for nearly 300 hours for parts of Central Texas and D/FW. In December 1989, we had a cold spell that bottomed out with readings of -4 below on the morning of Dec 23, that totally killed some ligustrum and other to the root. In the 2011 freeze event, we had no real damage to Ligustrum or Oleander, although it did kill a fairly large Washington robusta palm tree we had. I have seen Oleander killed to the ground fairly often, but the pink flowered variety seems to be hardy enough to survive almost any winter that we could be dealt here. I had a red flowered one that was killed in the 1983-4 freeze. Sago palm survived easily the 2011 winter, and I have read of a group of these trees in Northern Mississippi surviving since the 1920's, so they should be safe.
Unfortunately there are many other invasives that cold weather will not harm. But a strong cold spell could help to control ligustrum to some extent, perhaps from Austin north anyway. We need any help we can get on this one.

https://neilsperry.com/2011/02/helping-landscapes-recover-from-extreme-cold/

My top invasive shrubs or trees in Central texas:
1. Glossy Privet (Ligustrum lucidum)

2. Heavenly Bamboo (Nandina domestica)

3. Chinaberry (Melia azedarach)

4. Chinese Pistache (Pistacia chineses)

5. Chinese Photinia (Photinia serratifolia)

6. Callery Pear (Pyrus calleryana)

7. Chinese Tallow Tree (Triadica sebifera)

8. Persian Silk Tree (Albizia julibrissin)

9. Tree of Heaven (Ailanthus altissima)

10. Lilac Chaste Tree (Vitex agnus-castus)

Posted by lanechaffin lanechaffin, July 07, 2019 13:48

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