Weigela is a very durable shrub that requires little maintenance. Only average amounts of moisture are needed once the plant is established, so if you live where it rains often enough to keep the soil fairly moist, you won’t need to water it often.
If you want your weigela to grow faster, feed it once per season in early spring with a granular fertilizer formulated for woody plants, such as a rose fertilizer. However, fertilizing is not necessary for this shrub to grow and bloom well as long as your soil isn’t completely lacking in organic matter.
Keep in mind that your new weigela may be finished blooming already when you purchase it. Since the flower buds form on “old wood”, meaning last year’s branches, it’s important not to prune it until the following year after it is done blooming. Pruning sooner can eliminate next year’s flowers.
Wine & Spirits weigela naturally has a nicely rounded form, but it’s not a bad idea for the first few years to prune it to shape immediately after the late spring flowers are spent. This will help the shrub form a more attractive framework in the long run.