Plant Height. Basil usually grows to a height of 12 to 18 inches (30 - 45cm). Basil plants should be spaced between 9 and 12 inches (22 and 30 cm) apart. Basil will grow in a very wide pH range between 5.1 (strongly acidic) and 8.5 (alkaline) with a preferred range of 5.5 (strongly acidic) to 6.5 (mildly acidic).Sow seed indoors before last frost or direct sow outdoors after last frost.referred pH Range. Basil will grow in a very wide pH range between 5.1 (strongly acidic) and 8.5 (alkaline) with a preferred range of 5.5 (strongly acidic) to 6.5 (mildly acidic).
Ocean spring temperatures range from an average of 60 degrees Fahrenheit (16.5 degrees Celsius) in southern California to 50 degrees F (10 C) off the state's northern beaches.
1 In Southern California, Santa Maria experienced its warmest May in a 67-year record at an average 64.0 F (17.8 C), 6 F (3.3 C) above normal. 2  This included a recording of 105 F (40.5 C) on the 15th, the highest May temperature and the second highest all-time temperature observed in Santa Maria. Alaska had its 8th warmest March-May since records began in 1918, with a temperature 3.13Â°F (1.74Â°C) above the 1971-2000 average. 2  Alaska had its 2nd warmest January-May since records began in 1918, with a temperature 5.33Â°F (2.96Â°C) above the 1971-2000 average.