21. Remember that the optimum temperature for preserving foods safely with the best quality is 0 degrees Fahrenheit. 22. However the optimum temperature for germination is among 75?and 78 �F ( 24?and 26 �C ). 23. The optimum temperature for the growth of mycelia is, while the optimum for the growth of primordia is. 24. Their optimum temperature range is 21 24 �C, but have been known to adapt to warmer or cooler habitats. 25. Optimum temperatures for tree root growth range between 10 �C and 25 �C in general and for spruce in particular.26. Optimum temperature and relative humidity depend on several things, including the snail variety and even where breeding stock was gathered.27. The optimum temperature for human lactase is about 37 �C for its activity and has an optimum pH of 6. 28. For " H . aspersa ", the optimum temperature for hatching eggs seems to be at 100 % relative humidity. 29. After cutting, roses usually are put in water in cool storage units to get them to optimum temperature and humidity. 30. The Prius has a computer that s solely dedicated to keeping the battery at the optimum temperature and optimum charge level.