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Hyssopus officinalis Blue

Compact evergreen with aromatic leaves and masses of blue flowers

A deliciously aromatic herb with narrow evergreen leaves and eye-catching spikes of dark blue flowers throughout summer. Pick the leaves as needed through spring and summer.


Makes a lovely low informal hedge, perfect for a rock garden or sunny spot in a flower border.


Easy to grow in a well drained soil but add some coarse grit to the planting hole if your soil is heavy and wet in winter.

Add the leaves to flavour salads, rich stews, sauces and stuffing. The flowers are also edible.

Plant details

In depth plant information

Property Value
Plant type Herb, Perennial herbaceous
Flower colour
Foliage colour
Typically available February - September
Season of interest Summer
Flowering June - November
Evergreen Yes
Plant height 10 cm - 50 cm
Plant width 50 cm - 100 cm
Fragrant flowers No
Attracts bees Yes
Attracts butterflies Yes
Plant height in 5 years 20 cm
Hardiness zone (?) H4

Will perform best in these conditions

Property Value
Soil type Chalk, Loam
Light exposure Full sun, Part shade
Soil drainage Well drained, Medium
Planting instructions

Water the plant in its pot thoroughly before planting – give it a good soaking. Prepare the area by digging a hole twice the size of the pot. Dig compost into the base of the hole. Position the stake in the hole, on the side of the prevailing wind and drive it into the soil, to a depth of 60cm. The stake should be a third of the height of the tree, when planted. Remove the pot and position the plant in the hole close to the stake, with the rootball about level with the surrounding soil. Refill the planting hole with a mixture of garden soil and compost, firming as you go. Use two tree ties to secure the stem to the stake. Water in well and keep well watered during the plant's first year. Check ties regularly and adjust them as the tree grows.

Planting site Wildlife garden, Rock garden, Cottage garden, Informal garden, City garden, Courtyard garden, Flower border and beds

Additional Information for Fruit, Veg and Bulbs

Property Value
Sowing March - June

Typically available

From February to September