Mother's Day in New York: lilies and roses before the peonies open
Mother's Day in New York falls on the second Sunday of May, about two weeks before Northeast peonies open in late May and early June. A bouquet for that Sunday is built on what the month actually offers: greenhouse lilies, roses and hydrangea, while a peony on the table that day has usually flown in from the Dutch season instead.
Lilies, roses and hydrangea for a Sunday before the peonies
Greenhouse lilies, gerbera and lisianthus are cut all year, so a May bouquet for mum does not depend on what the Northeast weather happens to be doing. Hydrangea works the same way from the other direction: one large hydrangea head sits on its own stem, and a handful of them already reads as a full bouquet before a single rose joins in.
If she wants peonies, the closest stand-in on the day comes from the Netherlands, where the cutting season runs from late April into June. A peony cut while still folded tight, at what growers call the marshmallow stage, opens within 24–48 hours. Once open, it holds in water for five to seven days. One flower to leave off a mother's table altogether is the lily, which is poisonous to cats.

A folded-back French rose or Jumilia's pink edge
"French" on a rose is not a variety but a cut: a florist turns the outer petals back by hand so the flower reads fuller and more open than it would straight from the box. Among the French roses, Jumilia carries a bud up to seven centimetres across, white at the base and edged in pink, and holds in a vase for close to two weeks with the right care.
Colour still carries a rough meaning, even without one agreed rulebook: pink leans towards affection, red towards passion. A red French rose suits a mother just as well as a pink one if red is simply her colour. Eleven stems is one format in the section, and a dozen is the ordinary choice across New York. Roses also sell hardest around two dates in the American calendar, Valentine's Day and Mother's Day, so a florist's best stems move quickly in the week before.
A hat box, a basket on foam or a plant that outlasts May
A box needs no vase: it goes straight onto the table as it is handed over, lid open, ready. Flower baskets work the same way from below, with stems set into wet floral foam. Water the foam daily, in a thin stream over the whole surface, and never tip the basket to one side. A potted plant goes further still and stays on her windowsill long after the cut flowers in the same delivery have faded.
The box itself borrows its shape from nineteenth-century hatboxes, which is still the easiest way to picture how deep and sturdy it should be. Wherever the gift ends up in a New York flat, keep it away from a radiator. Our guide to flowers in New York covers the rest of that advice, along with stem counts and ordering from outside the city.

Mother's Day flower delivery in New York: card first, then the slot
Anna Jarvis pushed Mother's Day onto the American calendar, then fell out with the florists and card publishers who grew around it. Her complaint was that a printed card only tells a mother you couldn't be bothered to write to the person who had done the most for you. Every order here carries a card at no extra cost, and what goes on it is left to the sender. A foil heart balloon stays afloat for several days, while a plain latex one lasts roughly half a day, and either travels alongside the gifts to go with the bouquet.
The day itself is the busiest on the florist's calendar: order volumes run many times higher than an ordinary Sunday, so delivery windows are wider and no courier promises an exact minute. Booking a date and a slot a few days ahead works in any part of the city. A photo of the finished bouquet goes out before the courier leaves, and most orders are handed over the same day they're placed. The exact window for a given bouquet shows on its own page; full delivery terms are worth a look before checkout.
A dozen French roses read as the classic Mother's Day gift, and peonies are worth booking if the Dutch season has reached its peak. Flowers in boxes solve the question of a vase before it comes up.