Cucumber starter plants are to be grown indoors up to 2 weeks before the process of planting. Remember to wait until all risk of frost has passed to transplant. It is also possible to plant seeds directly in the garden. Arrange the garden in small hills and plant around 4 seeds per hill. Separate the seeds by about 3-4 feet. The gardener can also ground the cucumbers in rows. Space the rows about 6 ½ feet apart, with the seeds about 2 ½ feet apart in the rows. Remember that some cucumbers varieties are suitable for container gardens.