It is evident that the grape-grower must have some knowledge of the
relative time that grapes bloom, if he is to plant intelligently to
secure cross-pollination. The following table, taken from Bulletin 407
of the New York Agricultural Experiment Station, shows the blooming
time of grapes at that Station. Variations due to location and season
must be expected, but within the bounds of the regions in which these
grapes are grown variations will be slight. When this table is used
for other regions than New York, it must be borne in mind that the
farther south, the longer the blooming season; the farther north, the
shorter the season.

_Blooming dates of grapes._

From three years' records, the average length of blooming season for
grapes was twenty days, nineteen days in 1912 and 1914 and twenty-two
days in 1913. The first date in the average year of 1912 was June 14,
while for 1914, it was June 7:

TABLE IV.--SHOWING BLOOMING TIME OF GRAPES

=====================================================================
| VERY | | MID- | | VERY
| EARLY | EARLY | SEASON | LATE | LATE
-------------------+---------+---------+---------+---------+---------
Agawam | | | * | |
America | | | | * |
August Giant | | | * | |
Bacchus | * | | | |
Barry | | | * | |
Beacon | | | | * |
Bell | | * | | |
Berckmans | | * | | |
Black Eagle | | | * | |
Brighton | | | * | |
Brilliant | | | * | |
Brown | | | * | |
Campbell Early | | | * | |
Canada | | * | | |
Canandaigua | | | * | |
Carman | | | | | *
Catawba | | | * | |
Champion | | * | | |
Chautauqua | | | * | |
Clevener