How do you prune crinum lily? I have 2 that are growing out of control.
You can safely prune out the old dry and withered leaves, but I wouldn't disturb them much more than that until they are dormant. Then you can trim them and divide some out if you need. This article will give you more information on their care: https://www.gardeningknowhow.com/ornamental/bulbs/crinum-lily/crinum-lilies.htm
I live in the Houston Texas area. I originally planted two of these lily plants and now they've multiplied all over the bed! How do I thin them out? Is it necessary to pull out the entire bulb - because when I pull them the bulb splits. I'm wondering if that's enough to keep them from coming back or will a new plant just grow from the broken bulb? Thanks so much!
Yes, you would need to lift the entire bulb. If you leave part of the bulb you are in essence chipping or splitting the bulb. It will continue to grown
Do you have any garden friends that may love a division of your lilies? Do you have a garden club in your area? You could contact the club and see if any member would be willing to come help remove some of your plants and they could then share them.
Should I cut the entire stalk once the flower is spent? Or just the flower?
If you want to be perfect about it, you should cut it as it dies off... but cutting the entire stalk when the flower dies is the most common method, and will be fine here. This article will give you more information on their care: https://www.gardeningknowhow.com/ornamental/bulbs/crinum-lily/crinum-lilies.htm
I have 3 containers with crinum lilies that were left out in the snow how do I revive them?
There may or may not be much you can do. Just bring them in and keep them warm for awhile to see if they recover. There is a brand of vitamin B1 made for plants that can help with recovery. Thrive Alive is the brand. It can aid in the recovery of stress to the plant.
I transplanted this lily several years ago. While it produces leaves, it has never bloomed. What might be the cause, and what can I do about it?
I would guess that since you are right on the line of where they will survive, that this has a lot to do with it. I would try mulching them in the colder months with anything such as hay, leaves, or actual mulch.
Next, if this does not solve the issue, I would look at soil pH. This can be corrected with dolomitic lime. It is good to put this in the soil at least once a year, anyways.
Here is an article for more information on their care: https://www.gardeningknowhow.com/ornamental/bulbs/crinum-lily/crinum-lilies.htm
I bought a crinum lily bulb last year at the Master Garderen Show planted it in the ground as I was told to do. Went back north from Silver Springs Fl. The big black grasshoppers chewed on the leaves while we were up north. When we returned to Fl. I dug it up and put it in a 10 in. pot. It has new growth coming at the top but now there are reddish stripes on the lower leaves. What kind of fungus is this and is there anything that I can treat it with? Should I take it out of the pot and plant it in the ground or Should I take the pot back north for the summer to treat the plant?
This is usually stress induced, or a phosphorus deficiency.
https://www.gardeningknowhow.com/ornamental/bulbs/crinum-lily/crinum-lilies.htm
When I moved about a year ago, my new house had some Crinum asiaticums in the front. They were really small to begin with (maybe 3 feet), but have since grown to about 6 feet (which I understand is their maximum height. They’re too tall for my front window and I’m at the point of removing them entirely or cutting them back My question is how much I can trim them back. Can I cut it down to essentially the stump and let it grow back periodically? That way when the leaves grow too tall again, I’d cut it down to the stump. Would that be a viable option?
I think it would be preferable to move them to a new location. After they bloom, it's OK to trim back some of the lower leaves to tidy them up, but bulbs renew their energy through the leaves and I'd be afraid the continual cutting to the stub would diminish the flowering or worse yet, kill it.
https://www.gardeningknowhow.com/ornamental/bulbs/crinum-lily/crinum-lilies.htm