If you're wondering why I haven't shipped your bonsai, I hope this little explanation has helps you understand some of the issues around shipping bonsai trees in Canada in the winter.
Regardless how your juniper has fared though the winter, until now, check it and be prepared to change your watering and/or take some steps to up the local humidity. Over the winter your tree hasn't done much of anything. The air has been cooler. The sun has been insipid. But that has changed, and the immediate result is that your tree needs more water now than it did in December or January.
The air in your home is nothing like the air outside. It's naturally still. It's dry. It's enclosed. These factors all present some issues you need to deal with when it comes to your bonsai trees.
But please understand that winter in Canada is not a season for rapid growth and almost every tree will be slowing down- often a lot. So adjust your care and get your trees though the winter.
I realize that most people have bonsai trees because they actually want to see them and that's terrific, but if you are planning a long winter trip- dormancy is an option for some of your trees.