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That will most likely depend upon your location, Last Lee.
Could you please include your city, and state, province, or country in your personal profile, so that when you ask questions they can be more easily answered?
The sea buckthorn grows well in northerly climates, but it is subject to a number of plant diseases that might inhibit it from getting established farther south than the UK and Finland where it is most commonly seen. Here's a link to our Plant Database entry for the dwarf variety 'Sprite' but as you can see there's not much info and nobody is listed as growing it currently.
Dwarf Sea Buckthorn (Hippophae rhamnoides 'Sprite')