Nov 18, If you are wondering how to prune a St. John’s wort shrub, here are some tips: Plan on pruning off about one-third of the total height of the shrub in mid or late March. Pruning St. John’s wort involves reducing all branch tips and selectively removing some branches to thin the bushdrop.clubted Reading Time: 2 mins.
Prune these shrubs in early spring before they leaf out. Remove 50% to 75% of the top of the shrub maintaining a mounded form. Remove the heaviest canes all the way to the ground. Some summer touch up (after the shrub blooms), to reshape and remove spent flowers, will improve the look of the plant while stimulating additional flower growth. Prune your Saint John’s wort at the end of winter or at the beginning of spring, before the first buds start opening up, to ensure you’ll have optimal blooming.
Pruning every year isn’t necessary, but if you run the shears along the bush every 2 or 3 years, you’ll ensure your Saint John’s wort Estimated Reading Time: 4 mins. Sep 17, Many species of St. John's wort can be cut all the way back to the ground if necessary, but the shrub types should have about a third of the total height removed each season. Do this at Author: Jessica Walliser.
Simply begin the plant in a container and transplant the shrubs to the garden when they’re a few inches tall. Be sure to space them around inches apart, and water thoroughly after planting.
The best part is that once you get your St. John’s wort plants started, these weed-like Estimated Reading Time: 8 mins. Every three or four years, consider renewal pruning St. John's wort. Renewal pruning involves shearing the plant back to half its height in spring. Renewal pruning encourages dense, vibrant new growth and helps the plant retain a pleasing, rounded form.
Keep your shrubs in shape using these pruning techniques. 1. Prune a St. John's wort yearly in early spring to maintain a healthy, flowering, well-maintained shrub. Select the tallest, misshapen, oldest, wayward and unproductive stems to prune.