Houston recently had a hard freeze, which lasted several hours. My sago is very large and almost impossible to cover, and many of the upper fronds have now turned yellow. Is there anything I can do or are those fronds dead?
This article may help you with getting them to recover: https://www.gardeningknowhow.com/plant-problems/environmental/tips-for-saving-cold-damaged-plants.htm
Currently using a fish oil emulsion, which is somewhat effective, but I continually spray every two/three weeks to keep this under control. I'm in Sarasota, FL.
Try neem oil. I love neem oil in my garden. It works well as a fungicide and an insecticide and it is organic and safe for people, pets and beneficial insects. It should also be more lasting as it works from within the plant and will not be washed away by rain and weather. This article explains more:
The recent freezing weather in south Mississippi has made the top half of my six foot sago palm turn brown. Should I prune the top (damaged part) and leave the bottom layers that are still green? This beautiful plant is about 15 years old and I do not want to cause more harm to it.
Cold damage is a common occurrence with these plants, but oftentimes they can recover fine. This article should help: https://www.gardeningknowhow.com/plant-problems/environmental/tips-for-saving-cold-damaged-plants.htm
We live in Zone 9, north of San Antonio, TX. Our sagos suffered much frost damage, 17 degrees. Can we save them by pruning, or are they out of their comfort zone and in need of being replaced with something else?
I am sorry to hear about your plant. This cold has damaged many plants this year. You will need to remove the yellow and brown fronds this spring but only those as they will not come back. Just use sharp shears to do so. Do not remove green parts of fronds. These articles will help you as well:
It is hard to say how well they will grow back. Sago palms do not deal well with lost fronds, but they have been known to recover fine.
How should I care for my sago palm after the freeze we have had in Dallas, Texas. It has yellowed (in spite of fact that I covered it during the bad spell).
I am sorry to hear about your plant. These articles should help:
We live in the Texas hill country and have several sago palms (Cycads). They really got frozen back this year. While most of the fronds are yellow, there is some green deep inside the plant. Can they be saved or will we have to replace them?
I am sorry to hear about your plants. If the stems are alive, they have a chance of recovering. These articles will help:
My Sagos have been adversely affected by the 30 degree weather that we experienced over several days here in Louisiana. The top fronds are turning yellow and even browning. What do you suggest that I do as they are highly visible in my landscaping at front entrance of the house? I want them to look their best. Someone suggested that I trim the entire plant back to the center pod, but I am being cautious at present.
I am sorry to hear about your plants. I would hold off for now with trimming and wait until spring. This article will help: https://www.gardeningknowhow.com/plant-problems/environmental/tips-for-saving-cold-damaged-plants.htm