Early season. plant care and protection should be provided to your seedling prior to planting outside. Frost dates for regions in North America vary providing an early season microclimate environment of warmth will help the plant become quickly established.
Planting outside from the pot has a few concerns; the main problem is frost.
To resolve this, build a cold frame or hoop house to protect your seedlings at night when frost is expected. Some people build huge elaborate structures and others build standard small unheated 4' x 4' x 4' enclosures.
The main problem with the cold frame is they are not heated. Lights or electrical heaters can be used to keep the soil and air temperatures above normal on chilly nights.
Underground buried heating cables are another more elaborate option against the cold. Simply planting your seedling in the elevated mound of soil in a cold frame will provide the most natural heat for the buck as the daily sun will
warm the hill and surrounding soil. However, vine growth will be slowed without some type of climate enhancing protection. Seedlings can be planted 3 or 4 weeks before last frost in such shelters. It is vital that you take adequate precautions defending against the cold nights. North West winds and clear skies are often the harbinger of a chilly night. Frequently consult the weatherman to avoid the death of a plant if conditions warrant.