4 The Colorado Experiment Station. 
contains much straw or rubbish, as it interferes with cultivation and 
irrigation. The grower usually hauls as much manure as he has 
time to, thus sometimes applying as much as fifteen or twenty loads 
to the acre. This is the practice of those growing Self-blanching 
on the heavier bottom lands. The Pascal growers do not manure 
so heavily, claiming that if they did their upland soils would become 
too light. However, they often use a few hundred pounds per acre 
of commercial fertilizer, mostly composed of slaughter house refuse. 
This is drilled in beside the row during the growing season. A gar¬ 
den drill with an extra large hopper is used for distributing the fer¬ 
tilizer. 
The ground is plowed six or eight inches deep and worked 
into good garden shape before setting the plants. Some practice 
plowing about twelve inches deep every third year. 
Varieties. —In commercial growing only two varieties are being 
used at the present time to any great extent. These are the Golden 
Self-blanching for the early market, and Giant Pascal for the late 
market. These supply all that the present market requires, for by 
proper methods, Golden Self-blanching can be put on the market 
from early August until the Giant Pascal is ready and this latter 
can be held as long as it is profitable to keep it in storage. The Gol¬ 
den Self-blanching is not as crisp and tender nor of as good quality 
as the Giant Pascal, but owing to its earliness, the ease with which 
it is blanched and the fact that so much more can be grown to an 
acre, it is far the more important in respect to the amount grown. 
Pascal celery does not come onto the market until about the first of 
November and we are entirely dependent on the Self-blanching up 
to that time. 
SEED. —Most of the seed is procured from American dealers, but 
the growers nearly always ask for French grown seed, because in that 
country the seed is usually more carefully selected. A few growers 
have sometimes grown their own seed and obtained excellent results 
by its use. Sometimes a grower will raise enough seed one year to 
last him several seasons, preferring to do this rather than use seed 
bought from unknown sources. So far as the writer knows, there 
is no one in this section growing his own seed each year. The rea¬ 
son given is not because good seed cannot be grown here, but be¬ 
cause the price of seed is so low that it is unprofitable to grow it for 
sale, and the growers will not go to the bother of keeping plants 
over winter just for their own seed. Owing to failures as the re¬ 
sult of poor seed, it seems as though the use of home grown seed 
would be more than justified, even though it cost more. 
Vitality of seed is quite variable, so it is impossible to figure 
the number of plants which may be procured from a given amount. 
It is estimated in buying seed that one can count on 2,500 plants 
per ounce of seed, but this is very conservative, for some growers 
