is is too late to plant garlic in my garden now long island ny

Welcome!
Garlic is generally planted in the fall, and it uses that winter time to concentrate on root development and cloves formation/separation. In the warmth of following spring & early summer it will grow leaves and more mass to its bulb.

If you plant them now, they will immediately start leaves and bulbing... so it can't grow as big or as well- not giving you the result you may expect. Or, it might. If you're up for an experiment- and don't mind the effort that might give unexpected results- no harm in trying!

If you already have the bulbs, plant them ASAP! Otherwise, maybe wait until fall to purchase garlic 'seed' bulbs (so they are fresh from this year's "seed garlic" stock) and plant between Halloween and Thanksgiving in the U.S.
Then harvest by around mid-summer.

This article may help...
https://ohioline.osu.edu/facts...

Ohio state university extension said:
Garlic can be planted late in the fall, after other tasks are finished. The cloves will produce roots and minimal shoot growth before going dormant late in the season. Growth resumes in the spring and the bulbs develop, called bulbing, in mid-summer. Fall planted garlic plants are more mature and will form a larger bulb while spring plantings of cloves will result in smaller heads of garlic.

I agree with Ken 100%. Get them in the ground ASAP! Save your best out of your harvest to plant in the fall. Order your seed garlic now for the fall. They will ship it after it is harvested.

I also agree with all of the above. I normally plant garlic in the fall but for the past few years have been planting any "leftovers" that are sprouting this time of year and have had pretty fair success with it - I look on it as "bonus garlic," from bulbs I probably would have otherwise tossed out. Even if it doesn't make large bulbs - sometimes mine don't even separate into cloves, just stay in a round ball shape - it is still perfectly useable; and you can use it even earlier as "green garlic," like green onions.