Perennial – St. John’s Wort

St. John’s Wort 

Botanical name: hypericum perforatum 

Beginner friendly?: moderate 

Average size at maturity: 1-3 ft in height with a 1-2 ft spread 

Hardy zone:  zones 4-9

Foliage color: green 

Flower color: yellow 

Bloom time: summer 

Growth rate: can reach fully mature size in 1-2 growing seasons 

Pruning instructions: prune/deadhead as needed throughout the spring and summer 

Propagation methods: propagate by seed sowing 

Landscape use: low hedge, rock gardens, erosion control, shrub borders 

Light needs: 6 hours of sun per day 

Special features: attracts pollinators, fragrant, deer resistant, drought tolerant, repels pests 

Watering instructions: water during periods of drought 

Fertilizing instructions : use a slow release all purpose fertilizer once a year in the spring 

Best time to plant: fall or winter 

Best type of soil: clay or loam 

Companion plants: coneflower, black-eyed susan, blanket flower

Toxicity level: toxic for humans and pets if ingested 

Invasive species: no