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.
Following is the average monthly temperature range in California: 1  Jan: 53.8 / 38.8. 2  Feb: 60.5 / 41.9. 3  Mar: 64.7 / 44.2. 4  Apr: 71.4 / 46.3. 5  May: 80.0 / 50.9. 6  Jun: 87.4 / 55.5. 7  Jul: 92.4 / 58.3.8  Aug: 91.4 / 58.1. 9  Sep: 87.5 / 55.8. 10  Oct: 78.2 / 50.6. 11  Nov: 63.7 / 42.8. 12  Dec: 53.9 / 37.7. 13  Ann: 73.7 / 48.4.ollowing is the average monthly temperature range in California: 1  Jan: 53.8 / 38.8. 2  Feb: 60.5 / 41.9. 3  Mar: 64.7 / 44.2. 4  Apr: 71.4 / 46.3. 5  May: 80.0 / 50.9. 6  Jun: 87.4 / 55.5. 7  Jul: 92.4 / 58.3. 8  Aug: 91.4 / 58.1. 9  Sep: 87.5 / 55.8. 10  Oct: 78.2 / 50.6. 11  Nov: 63.7 / 42.8. 12  Dec: 53.9 / 37.7. 13  Ann: 73.7 / 48.4.