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As long as they are smaller trees, yes, you can do this. The larger the tree, the more likely it is to go into shock and die when move, especially when moved into a pot.

If you plan on doing this, I would do so now and keep them well watered. This will allow them to acclimate to the pots and they will be healthy looking by the wedding. If you do it close to the wedding, the trees may go into shock and not have time to recover from teh shock before the wedding.

This article may be helpful:
https://www.gardeningknowhow.com/plant-problems/environmental/learn-how-to-avoid-and-repair-transplant-shock-in-plants.htm

Wet weather has resulted in molds growing where we don't normally see them. Use a broad spectrum fungicide on your trees. As for the suckers, think of them as branches. There are no roots to transplant. Cut them off at the ground.

It should not be an problem, just wash it off and wash it away from the tree roots system.

doccat5

This has to do with size of the plants, depending on what they are and where you get them - varies from place to place. The normal range for pots sizes is #1, #2, #3, #5, #7, and #10. Generally speaking, the larger the number, the larger the pot, and usually, the larger the plant. Most shrubs/trees are at least a year old prior to selling them. Here is more information: https://www.gardeningknowhow.com/garden-how-to/shop/nursery-containers.htm

Spring and early fall are the best times to move plants. The key is to do your best to keep the plants from going into shock. This article will help you with that:
https://www.gardeningknowhow.com/plant-problems/environmental/learn-how-to-avoid-and-repair-transplant-shock-in-plants.htm

Can you give us some more information?
Type of shrub? Are the leaves yellowing?