GERMINATION AND I.O.NV.KVITY OF SEEDS 



37 



year or more (holly, thorn, mountain ash). These dif- 

 ferences may be due to the form of the stored food, the 

 character of the seed coats, the nature of the plant, the 

 dryness of the seeds or of the soil, etc. For instance, 

 ginseng seeds, if sown as soon as ripe, should sprout the 

 following spring; if dry they may take 18 months or 



FIG. 28 VEGETABLE PLANT BEDS 



1. Celery for transplanting. 2. Seedling lettuce plants. The plants 

 kept free from weeds and are thinned and transplanted as may be needed. 



