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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.
Growing Information. How to plant: Propagate by seed Germination temperature: 45 F to 85 F-Will germinate at soil temperatures as low as 40 F. Days to emergence: 4 to 7 Seed can be saved 3 years.Maintenance and care: Sow seeds indoors 6 to 8 weeks before average last spring frost.rowing Information. How to plant: Propagate by seed Germination temperature: 45 F to 85 F-Will germinate at soil temperatures as low as 40 F. Days to emergence: 4 to 7 Seed can be saved 3 years.