Bizness Apps has closed their office located at 1635 California Street. They still have a website, though, so I'm guessing that means the company itself is still in business.
The Plant Warehouse has moved from their longtime 1624 California Street location to right across Polk to 1546 California Street.
There's no outside sign announcing what the business is at the moment, but the Plant Warehouse remains easy to find by the ever-present profusion of plants and bench outside the store during business hours.