Do you need to plant 2 kousa pink dogwood trees to pollinate? I know some dogwood trees need a female and a male specimen to pollinate. I was wondering if the kousa pink will self pollinate?
I am pretty sure that the kousa pink is self-pollinating so you would not need two.
For more information on kousa dogwood trees, please visit the following link:
https://www.gardeningknowhow.com/ornamental/trees/dogwood/growing-kousa-dogwood-trees.htm
We grew our Kousa Dogwood saplings from seeds that we collected from several trees. They sprouted well and we planted them in a seed starter kit we purchased at Agway. They were doing very well until the summer, when they became infested with springtails. We did not know until later that these bugs were eating the roots. The saplings did not grow very tall (one to three inches) by Autumn, so we decided to bring them indoors for the winter. We got rid of the springtails with cedar oil. It took three treatments, but they are definitely gone. When spring came, we put them outside, but they have not sprouted leaves. I'm assuming that they did need to be outside for the winter to get their cues from nature to sprout in the Spring. So, my question is: How do I artificially winter them to get them to sprout leaves? (The attached picture is from April 14th and they don't look as healthy now.)
I suspect that the trees did not get the proper dormancy while indoors. I am not certain that you can safely put them into dormancy now and bring them out in time to build up their energy reserves before they need to go dormant again in the fall. Plus, they may be too depleted to survive dormancy at this point. But, what they need to go into dormancy is cool temps and dry soil. They would likely need at least 6 weeks of dormancy.
Can you give tree too much water? And when is the best time to feed?
Dogwoods do prefer to stay moist but too much can create problems. Here is an article that will give you some great info on Dogwoods;
https://www.gardeningknowhow.com/ornamental/trees/dogwood/caring-dogwood-trees.htm
It is healthy and growing well but not blooming yet. ? What can I do?
It can take Dogwoods 5 to 7 years to start blooming.
Here is an article that will help you.
https://www.gardeningknowhow.com/ornamental/trees/dogwood/dogwood-tree-not-flowering.htm
3 Years in the garden has yet to bloom.
I would start with a soil test. This is the best way to determine if too much nitrogen is the issue or what you can do to amend the soil for the best blooming outcome for your tree.
Your nearest County Extension Office can help you with a soil test for a small fee.
These links will help you locate the nearest extension office and review the care requirements for your Dogwood Tree.
https://www.gardeningknowhow.com/ornamental/trees/dogwood/dogwood-tree-not-flowering.htm
https://www.gardeningknowhow.com/ornamental/trees/dogwood/growing-kousa-dogwood-trees.htm
https://www.gardeningknowhow.com/extension-search/
I planted one 6 years ago. The tree was 2 feet tall, never lost the green leaves, and never grew any higher.
Make sure your tree is planted in a location that gives it the conditions it needs:
https://www.gardeningknowhow.com/ornamental/trees/dogwood/growing-kousa-dogwood-trees.htm
Fertilizer can probably help with your tree's slow growth. Choose a nitrogen-rich fertilizer or organic alternative:
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/nitrogen-plant-fertilizer.htm
Is it too late to plant a Kousa dogwood tree now? We have one in a pot. Would I be better off just sticking pot and all in the ground for the winter?
No, it's not too late to plant. Planting now, and giving the tree some winter protection for the first year if you are in a cold climate, is the best option.
http://extension.uga.edu/publications/detail.html?number=C900#Planting
https://www.gardeningknowhow.com/plant-problems/environmental/protecting-plants-winter.htm