GRAPES After removing the seeds from stratification in early spring, you can plant them in small pots, or in larger pots with at least 1 1/2 inches of space between them. A greenhouse is the safest place for them until June, when you can transplant them to their permanent places outside. They need temperatures reaching at least 70 degrees Fahrenheit by day and approximately 60 degrees Fahrenheit at night during this germination period. The time it takes the seeds to germinate varies from approximately two weeks to two months; sometimes receiving 15 hours of sunlight per day encourages them to germinate sooner rather than later. If some seeds don't germinate, you can always pop them back in the fridge for stratification until next season and try again then.