Vancouver was
the Pacific port (and is mostly still the same today) while Halifax competes with Montreal and to a lesser extent Saint John.
The railway links from the Maritimes to the rest of Canada were controlled by only a few interests in Central Canada, and prices fluctuated wildly. So a manufacturer could find that costs changed dramatically overnight, and I would not be surprised if there were political interference from industrialists mostly centered in Montreal. The bottom line is that the industrial destiny of the Maritimes was controlled by politicians and industrialists in other provinces and there is no way for that to turn out well. Maritime companies were interested in ocean trade while Central Canada was more focused on supplying the west. It was hard for producers in the Maritimes to sell directly to other countries because of protectionists national economic policies, and Halifax was never going to be the main city supplying the Prairies.
There was a lot of industry in the Maritimes even at the time of Confederation and it continued into the early 1900's, though it didn't prosper as much as Central Canada. In Halifax there were large garment factories, sugar refineries, breweries, Moirs, there was the rope works and Starr manufacturing in Dartmouth, and on and on. One thing that bothers me is that even a lot of people in the Maritimes don't appreciate this history; Canadians in general tend to think that the Maritimes always had a resource based economy but the Maritimes were the first to industrialize and this industry struggled and withered after they joined (were forced into joining) Canada.
Clayton and Sons
Source
Dartmouth rope works, much larger than I thought. Is there anything left of this?
https://twitter.com/dartmouthfairy/s...45528977465344
A lot of Halifax's factories were physically destroyed during the explosion and they were sold off at fire sale prices after and in a lot of cases never reopened. I think it's clear Halifax already wasn't doing as well in the 1910's as other cities but I also think the explosion is underestimated not just in terms of loss of life but in terms of damage to the city. I'd guess that more than half of the city's industry was damaged and a significant number of people were disabled. There's nothing analogous to that anywhere else in the history of Canada. Without the explosion I think Halifax would have been in a different place in 1930. From 1930 onward it actually did pretty well compared to most other Canadian cities. It was one of the fastest growing cities in the 40's, 50's, and 60's.
The good news is that we are going through a decentralization phase now, which I think is actually good for the Maritimes, assuming the trade deals are negotiated fairly. You can now live in Halifax and trade easily with people in the US or UK or China or South Korea. Not everything has to come from Toronto and Montreal.