I am mostly doing nothing but pruning once it is practical (i.e., plants I usually cut/prune because the top always gets zapped like ferns, etc.). Observations from my neck of the woods on the Dallas/Forth Worth Metroplex, not necessarily from my garden... It got down to -2F in many areas around here.
Osmanthus fragrans (sweet olive) are in ICU, being evaluated. The prognosis is not good. No new foliage or growth from the base. April 6 - detected some leafout.
Some roses took a hit and are now growing back from the base (2' tall by 04/04/21). One Knockout was unfazed. Waiting to get any blooms from any rose now. Got one bloom from one that grew from the base.
All Indian Hawthorna are most likely dead; very brown, no leaf out and no new growth from the base. They cannot withstand temperatures below 0F and we got below that. Will have to figure out what to replace them with. Still dead on April 6.
Oleander also took hit (04/04/21 still dead looking). There seems to be some green but it is not a TAMU Hardy cultivar so I am not sure it will make it. In ICU. Still in ICU on April 6.
All Loropetalums look dismal but I saw something on one which may be leaf out or an old leaf out so I left them alone (04/04/21 saw some leaf out on a few of the loropetalums, not all). They cannot withstand temps below 0F either. Detected leaf out or new growth on all on April 6.
Azaleas were blooming or about to start. One that was blooming appears to be dead, probably because of bark split while others, which had unopened flower buds, have some injury in half of the plant or less.
One camellia appears dead as it was blooming in February. I suspect Camellia Japonicas and Sinensis, which were blooming and had sap running, may have been injured more than Camellia Sasanquas which bloom in the Fall and were probably dormant in February. 1:45pm 3/23/2021 observation: the so-called "dead" azalea is leafing out from selected branches and from the ground today. One camellia still dead looking as of April 6. The rest are in great shape, alive, recovering. As of April 24, the dead looking camellia has some leaf out signs near the base of the trunk, about 1-2" from the soil line.
Japanese Rose looks great. Wisteria is about to start blooming. Hydrangeas are starting to leaf out but may be bloom unreliable this year if they produced flower buds in 2020 that were supposed to open in Spring 2021. Annabelle-like hydrangeas and paniculatas are leafing out; should be ok but I see some stems -not many- still not leafing out. Will wait until May to prune them all the way down.
Apple trees and most non fruit trees (except palms) appear to be fine. Peach, pear, Texas/Oklahoma Redbud, Bradford Pear trees are blooming or leafing out.
Hollies and Yaupon Hollies doing ok. Iris and daylilies coming out. Photinias are leafing out. Quince is blooming. Forsythia is leafing out and had a few late blooms that I noticed. Abelia, Barberry and Boxwoods are doing well. Nandinas did well but some lost foliage where temps dropped to -9F. Spirea seems to have survived and is blooming. Mountain Laurel and Rose Of Sharon looked ok. Salvia is coming back from the ground so last year's growth may need to be pruned if you see no leaf out but I found one salvia with a few branch tips, very few, leafing out. Cannas are slowly coming back. Mexican oregano is coming back. Ferns are coming back.
There are many browned out shrubs out there that -from afar- I have not been to identify when driving by.
Vitex (03/25/21 noticed leaf out), Crape Myrtles (04/04/21 noticed leaf out), Hibiscus, Beautyberry (03/25/21 noticed leaf out), Butterfly Bushes, Mexican Petunia are still asleep or are unknown. These tend to be late breaking dormancy. Texas sage is hard to tell from afar as dead foliage may stick and appear to be doing well. Does anyone know how their Texas Sages did? Grasses, Hostas, Lantanas, Lilacs, Purple Heart, Turk's Cap or verbenas - have not noticed any; can anyone comment on those? For reference purposes, please indicate how cold it got in your area. As of April 24, I have seen recovery in sages (Sages have new foliage) and Turk's Caps (Caps have new growth from the base).
Weeds are doing very well. Outstanding, actually. ;o)) They have no idea that there was a freeze at all! Hee, hee, hee. Think: dandelions!
Get your allergy shots up to date!