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.
In April the range/ variation of daily mean temperatures is 15.4 Â°C (27.7 Â°F). The weather in April is somewhat parched with seldom any rain. A paltry 24.6mm (1in) of liquid falls during an average of 4 days. In April the blue above Fresno, California is glorious having an average of an appreciable 10:40 of radiant sunshine per day. The shortest day is 12:32 long and the longest day is 13:38 long with an average length of 13:06.