I am located southwest of Miami International Airport and low temperatures here track a few degrees lower than the airport.
I use two indicators, the lowest winter temperature and the number of nights the temperature falls below 50 (my arbitrary indicator)
I use 50 as a benchmark based on the point I will see leaf burn or stress on various palms or ornamental shrubs.
The two graphs reflect minimums back to 1957 as does the "cold night" chart.
Some notable points-
1. Lows below 50 are less frequent (average now 9.58 nights a year- 1962-2022)
2. The last time the airport went below 32 was Christmas 1989
3. Average annual low 40.14 (1965-2022)
4. Consider that the airport is much larger, more paved area and the urban area now extends around and way past the airport, so heat island impact seems likely.
5. If you are starting out, here's some suggestions- locate the nearest official weather reporting location, airport, local weather service office, and determine the typical difference in low temperatures compared to your location. Check on the forum for the experience of others in your area, ask local nurseryman, citrus growers, farmers, they are often a valuable source of frost/freeze information. Keep in mind the place you live may not have existed until recently, so long time locals may be the best sources. While the heat island created by the expanding developed areas can moderate the impact of winter cold, best to treat this factor conservatively. The last period of extreme cold was from 1977-1989, so there may not be any clear indication of what impact might be felt in your location.
Miami winter seasonal minimum history.pdf winter nights below 50 Miami.pdf
I planted this windmill palm in my yard about 5 months ago. It was looking fantastic up until about two weeks ago. Then the lower fronds started to droop. Then the centers of all of the fronds started to yellow a bit and now I'm noticing the individual blades are folded in half. I live in Raleigh, NC where these palms are prolific. It's planted in a mostly sunny area that doesn't drain very well so I mounded it up when I planted it. But because it doesn't drain well and the area stays fairly moist, I haven't given it any supplemental water and it's been hot and dry for weeks. Could this be drought stress? I thought it could also be a fungus so I sprayed it with copper fungicide, just in case. Anyone have thoughts to share?
I didn't really plan ahead and planted a windmill palm under a power line a few years ago. It is about a foot or 2 to the left of it. The top power line is about 15 ft high maybe and the line under it about 12 ft high. According the web it says it normally grows to only about 8-10ft in the cooler growing zones 6 and 7. I am in Tennessee, and some sites list my area as zone 6b, other sites say I am in zone 7a. Most of our winters are above zero.
But it's absolute max height is like 30 or 40ft if it is in really ideal conditions. It says it commonly reaches 10-20ft in landscape uses, however. It is in I would say partial or full shade. I know it's probably really unlikely to get past 10ft. Has it ever gone past 10ft in a cooler zone, or should I just not take any chances and move it? I know it probably wouldn't like to be dug up and also it has been established for so long and handles winters much better than it's first winter in which it defoliated but every winter after that it has kept it's lush green leaves.
It seems really happy their and puts out several leaves a year. It seems to love our abundant rains. It, however, doesn't seem to grow very fast trunk wise. Maybe it grew about an inch or two of trunk over 3 years and 10 or so leaves.
Hello everyone, I was looking at an app called iNaturalist, which is an app that lets you post and look at observations of plants and animals around the world, and I typed in Cocos nucifera and found this post in northern Morocco by the Mediterranean Sea. Does anyone know any information about this? I thought that it would be too cool in the winter for them there.
Is this normal? I noticed the oldest frond on my new Washingtonia robusta that I got from Lowes (really cheap) was dying in a weird way, it is almost like the way some diseases start in palms. But the thing is it was like this for a few weeks now, I think I am just being paranoid. Does this look normal? Maybe it was just damaged so it is dying like this? I just am hoping this doesn’t have some disease.