bismarck palm 10 ft high was growing well looking great
No, topping it will kill that shoot off. It may grow a replacement, but I would not recommend doing this. If it has an infection, then cutting will be a death sentence. Unfortunately, your photo did not come through. I am unable to determine what is happening to your tree.
In the meantime, this collection of articles will help you with their care:
https://www.gardeningknowhow.com/ornamental/trees/bismarck-palm
We had an issue with dark deformed fronds and had the bismark spiked About 8 months ago in order to try and save it. The New growth finally seemed right but the cut off frond ends started to come off easily from the trunk. It was then we noticed a void in the trunk. The void has very sharp, not tattered edges. Can it be saved or is it time to cut down because of the damage/injury? Please see attached photos. Thanks.
It looks like it will be able to be saved! Copper based fungicides will be your best bet, here. This article will help:
https://www.gardeningknowhow.com/garden-how-to/info/what-is-copper-fungicide.htm
This article will help you to care for the palm:
https://www.gardeningknowhow.com/ornamental/trees/bismarck-palm/growing-bismarck-palms.htm
My bismark has brown tips on some of the leaves--the other bismark right next to it does not--what is going on ?
Brown leaf tips usually indicate too much or too little watering. Bismarcks are drought tolerant so I'm wondering if one is getting more water than the other or is in a bit of shade. If that seems satisfactory, I would then check the soil nutrients. Often palms suffer from mineral deficiencies.
https://www.gardeningknowhow.com/ornamental/trees/bismarck-palm/growing-bismarck-palms.htm
Hello, I just ordered my first palm seeds (Bismarck, Canary Island and regular dates). I have seen mixed info regarding their cold hardiness, I live at the very bottom of zone 7b ( few miles from 8a). Should I start trying to germinate the seeds now or wait until spring? Also, I know that they are cold hardy when mature but when is that exactly? Thanks for your help and have a nice day.
You could go ahead and start germinating them in pots indoors. You will likely need to grow these in containers and move them indoors in winter. These may be too large for container culture but it may take them years to reach an unmanageable size.
A Bismarck palm is only hardy in zones 10 and 11, quite a stretch from your 7/8.
https://www.gardeningknowhow.com/ornamental/trees/bismarck-palm/growing-bismarck-palms.htm
Canary Palm is hardy in zones 9-11, probably not close enough to your zone.
https://www.gardeningknowhow.com/ornamental/trees/canary-palm/canary-island-palm-trees.htm
Date palm is a relative of Canary palm and hardiness varies by type of date palm, but similar to Canary. They are both very large trees.
https://www.gardeningknowhow.com/edible/fruits/date/date-palm-tree-care.htm
This article tells more about date palms and which palms are more cold hardy:
https://gardeningsolutions.ifas.ufl.edu/plants/trees-and-shrubs/palms-and-cycads/date-palm.html
Tree is approx.30 ft.tall, about 6ft. from the front of our home, can the roots cause damage to our foundation as the tree grows?
I think that it is right at the appropriate distance that will avoid damage, but you may run into a problem with the spread distance. From the trunk, the tree will reach out about 8 feet at maturity. With this being said, it is not the worst of problems.
https://www.gardeningknowhow.com/ornamental/trees/bismarck-palm/growing-bismarck-palms.htm
It's an eighteen year old palm and around 20 feet high.
There are separate male and female palms. You will need both in order to obtain seeds. The female is more important, since any males in the area can pollinate the female, which will bear the fruit.
https://www.gardeningknowhow.com/ornamental/trees/bismarck-palm/growing-bismarck-palms.htm
in warm water in thermos flask to break the dormancy of the seeds? Or can I use compost to generate heat for the seeds to sprout? If there is any other cheaper way of sprouting the seed of Bismarck. Pls provide step to step local way achieve Bismarck seeds sprouting as heat mat is not sold in my country Nigeria. And light to power the heat mat is not constant. Thanks.
Actually, using compost as a heat source is a great way to do what you need! This article will help you to do so:
https://www.gardeningknowhow.com/composting/basics/compost-greenhouse-heat.htm