Cardoons.
Sow two or three seeds together in clumps 1 ft. apart, in trenches prepared as for Celery, in April or May. When 6 in. high pull up the superfluous plants, leaving the strongest one in each case. When they have attained the height of 1-1/2 ft, tie the leaves lightly to a stake and earth-up the stem. Keep them well supplied with water, adding a little guano. They will be ready for use in September. Another sowing may be made in June for a spring crop.
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