Brown leaves starting to go brittle
Unfortunately, your photos did not come through. I am unable to see the damage. There are many diseases that plague this tree, and most of them occur due to wet soils.
These articles will help:
https://www.gardeningknowhow.com/edible/herbs/bay/bay-tree-diseases.htm
https://www.gardeningknowhow.com/edible/herbs/bay/dealing-with-pests-on-bay-trees.htm
ed a hard freeze last Feb in Texas. After the freeze I cut back the growth that appeared burnt and in the summer I didn't prune it at all. Can I just cut the bulk of the tree, about 5 1/2 ft and cultivate the root growth successfully?
Yes, likely, you can cut back what is dead and the living portion will take back over. This will be done in late spring. Here is an article that will help you to do so:
https://www.gardeningknowhow.com/edible/herbs/bay/cutting-back-bay-trees.htm
This problem with the leaves is also happening to all new growth. The tree was planted from a tub and into the earth over 10 years ago and this is the first time the tree has developed this symptom. The tree is almost 30ft tall and is planted in a border with no other trees planted near to it and the soil is free draining.
It could be a fungal infection or pest invasion. Also, bay trees don't like a lot of water or wind. You may be having a wetter winter. Here are some tips that should help:
https://www.gardeningknowhow.com/edible/herbs/bay/bay-tree-winter-care.htm
https://www.gardeningknowhow.com/edible/herbs/bay/bay-tree-diseases.htm
https://www.gardeningknowhow.com/edible/herbs/bay/dealing-with-pests-on-bay-trees.htm
https://extension.unh.edu/blog/2018/03/how-can-i-get-rid-brown-soft-scale-my-bay-laurel
https://www.gardeningknowhow.com/edible/herbs/bay/rooting-bay-tree-cuttings.htm has "Bay tree, also called bay laurel or California laurel, can grow to 75 feet (22 m.) tall". But both https://www.gardeningknowhow.com/edible/herbs/bay/which-bay-trees-are-edible.htm and https://www.gardeningknowhow.com/edible/herbs/bay/bay-tree-varieties.htm differentiate between Bay tree (Laurus nobilis) and California bay (Umbellularis californica).
Confusing isn't it? The third article explains that in the commercial market, Laurus nobilis and Umbellularis californica are often sold as the same plant. It also says the California bay is harsher in flavor but can be used as a substitute for Bay Laurel. So that is why some people use Bay Laurel and California Laurel interchangeably.
But you are correct. They are different plants.
I have a 1.5m "lollipop" type bay tree that has been damaged. The ball was formed from two main branches and one snapped off. Tried to graft it back but did not take. Is there anything I can do to reinstate the foliage or is the tree damaged beyond hope? If I cut it all back to the trunk can it grow again? Please see photo provided. Any advice greatly appreciated.
You can cut off the damaged limb and shape the remaining branch into a ball by pruning. It may take two or three years to shape it, however.
If you cut it back to the trunk you will get sprouts.
Hi. This laurel is now over 20 feet (7 metres) tall. How would you recommend bringing it under control before it destroys the garage ? I used to prune it to about two thirds of the current height.
Since it is so tall, the easiest thing to do would be to remove several of the trunks. Here is more:
https://www.gardeningknowhow.com/edible/herbs/bay/cutting-back-bay-trees.htm
Happened quickly over a few days. Can’t see any suckers. Baby leaves went floppy then got brown patches. All adult leaves green but they are all now pointing upwards. Pls help 😞 Also petunia flowers gone white and feeble looking.