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.
Weather & Seasons. Much of California has a Mediterranean-like climate with warm, dry summers and mild, wet winters. On the coast, the average daily high temperature hovers around 70Â°F/21Â°C and up), but can occasionally spike to 80Â°F 27Â° C or more on hottest summer days; freezing temperatures are rare, even in winter.eather & Seasons. Much of California has a Mediterranean-like climate with warm, dry summers and mild, wet winters. On the coast, the average daily high temperature hovers around 70Â°F/21Â°C and up), but can occasionally spike to 80Â°F 27Â° C or more on hottest summer days; freezing temperatures are rare, even in winter.