The hardest part of a romantic surprise in East Newark is not choosing the flowers. It is the front door. This borough is about a tenth of a square mile of two- and three-family houses running along Grant Avenue, North Third Street, Central Avenue and the numbered blocks, and the standard building here puts three households behind one vestibule with three bells and, very often, no names on any of them. A driver holding a dozen roses and a street number has a one-in-three chance. Whoever answers first takes the flowers in, and by the time they reach the person they were meant for, someone else has read the card, asked a question, or simply told them. So the single most valuable thing you can type into the address line is the floor or the apartment letter. Second most valuable: your own mobile number rather than your partner's, so that any confirmation call about a surprise does not go to the person being surprised.
Timing in this borough runs on the train. East Newark has no station of its own, but the Harrison PATH stop is a short walk over the line and it is how a large share of the neighbourhood gets to Manhattan and back; Newark Penn Station and the NJ Transit lines are five minutes the other way over the Passaic. That gives you a practical rhythm to aim at. A bouquet that lands at ten in the morning sits in a shared hallway for nine hours. One that lands in the last window before the evening commute arrives roughly when they do, which is the version people actually imagine when they order. If you want flowers at their desk in Manhattan or at a Newark office instead, that is a different order with a different problem — lobby desks want a floor, a department and a name on the visitor list — and it means your partner carries a vase home on a rush-hour train. Sending to the house and timing it to the evening is the kinder choice almost every time.
East Newark's own romance geography is small and specific. The borough's one piece of open water frontage is the East Newark Hudson County Riverfront Park at 1 Central Avenue, at the bottom of the hill where the grid runs down to the Passaic; it is where an evening here ends rather than where it begins. Understand what it is before you build a plan around it: the borough publishes the location and public hours, which is not the same thing as somewhere that will take a delivery, hold it, or keep it out of the sun. If flowers are meant to appear during a walk down there, either carry them yourself or agree a handoff with a named person beforehand. Everything else — dinner, a hotel, a night out — is over a bridge, and the closest options are the Ironbound's restaurants on the Newark side, the two hotels on the Harrison riverfront just over the borough line, downtown Newark near Military Park, and the Jersey City and Hoboken waterfronts. Those are all front-desk or carry-in situations, never room deliveries.