The best time to transplant is when the shrub is dormant in fall or winter. But if you need to move it in spring that is fine, you will need to water it more. Just don't move it in the heat of summer. Here's an article that will help:
https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/transplanting-hydrangea-bushes.htm
The best time to transplant is when the shrub is dormant in fall or winter. But if you need to move it in spring that is fine, you will need to water it more. Just don't move it in the heat of summer. Here's an article that will help:
https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/transplanting-hydrangea-bushes.htm
we HAVE THREE bushes in our garden with no flowers. How do we get the hydrangea bushes to grow flowers ???
Here's an article that will help:
https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/hydrangea-not-blooming.htm
I want to order
We do not sell plants, but only offer information on how to care for them. I would recommend sourcing locally, or trying online vendors like Amazon, Etsy, or Ebay.
In the meantime, here is an article that will help you to find a cultivar for USDA zone 3:
I live in central Iowa.
This is quite fortunate. This could be considered a dormant period, so planting as soon as the ground remains above freezing will be appropriate.
Are are some helpful articles:
https://www.gardeningknowhow.com/garden-how-to/gardening-by-zone/zone-5/zone-5-hydrangeas.htm
Purchased seed off internet. It had poor reviews. Supposed to grow tree like plant . Seeds are large , the size of small watermelon seed
I find that it is important to heed the reviews. You may have gotten bad seeds.
I have planted limelights and endless summer blue.
This article may help:
https://www.gardeningknowhow.com/plant-problems/pests/deer/deer-repellents.htm