The district is bounded by Anantapur District to the northwest, Kadapa District to the north, Nellore District to the northeast, Krishnagiri District, Vellore District and Tiruvallur District of Tamil Nadu state to the south, and Kolar District of Karnataka state to the west.
Physical Characteristics. Banksia integrifolia is an evergreen Tree growing to 9 m (29ft 6in). It is hardy to zone (UK) 9 and is frost tender. It is in leaf 12-Jan It is in flower from Aug to December. The flowers are hermaphrodite (have both male and female organs)It is noted for attracting wildlife.
Jonine Smith said Billings has been rated a Zone 3-4 and may be a strong 4 now.. Chip Smith said he has a lot of Zone 5 material that won't grow here on a sustained basis. Jason Marble, of Billings Nursery and Landscaping, said he would not plant a Zone 5 tree. Zone 4 is defined as when the average low temperature of the year is from 20 below to 30 below Fahrenheit. Zone 5 is rated at 10 below through 20 below.