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The minimum temperature for germination of barley is 34 degrees to 36 degrees F (1 degrees - 2 degrees C). After the seed takes up moisture, the primary root (radicle) emerges. The radicle grows downward, providing anchorage and absorbing water and nutrients, and eventually develops lateral branches.arley can be distinguished by differences in head type and growth habits. In a six-rowed barley, three kernels are formed at each node of the head while in a two-rowed type, only a single kernel forms at each node (figure 1). Barley is also classed by its requirement for cold temperatures.
Germination temperature: 50 F to 85 F-Will germinate at temperatures as low a 40 F. Will germinate in about a week at 75 F, with adequate moisture. Days to emergence: 7 to 21. Seed can be saved 3 years. Carrots are slow to germinate (1 to 3 weeks), and often germinate unevenly over a period of several weeks.