Product description
Rosemary 'Sissinghurst Blue' is a celebrated upright variety cultivated widely for the intense, resinous aroma found in its dark green, needle-like leaves. This potent fragrance, which carries strong notes of pine and camphor, is released instantly when the foliage is brushed against or chopped for cooking. It is traditionally used as a robust culinary herb for seasoning roast lamb, potatoes, and savoury breads, while its darker flowers are considered some of the best for attracting bees and early pollinators.
This plant is typically grown as a structural, semi-upright shrub that adds height to herb borders or serves as a decorative focal point in large containers. It is generally hardy but benefits from shelter against cold, drying winds. For the best results and most prolific deep-blue flowering, plant it in a location with full sun. It is highly drought-tolerant once established and requires poor, free-draining soil, as it will quickly suffer if kept in damp or heavy, waterlogged ground.
Please Note: When purchasing plants please consider that each live item is unique and may therefore differ from the images shown, which are for illustration purposes only - The plant will be supplied in a growers pot.
Garden Plant Size Guide

Plants in larger pots can be multiple years older than their smaller counterparts with more mature root systems and foliage. This makes them able to thrive as a full size plant in your garden quicker than smaller alternatives.
The most common size of pot that garden plants come in are 9cm/1L/3L/5L this is in reference to the diameter at the top of the pot.
9cm potted plants still remain the most popular cost effective option though, they just may take a little patience to allow them to grow into full maturity once planted in your garden.
Plant specs, care guide & tips
Key features
When to plant
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
Planting and period of interest times are general guidelines and may vary based on your location and conditions. For best results, consult local gardening resources.
Instructions
Top Tip
To maintain the neat, semi-upright habit of Rosemary 'Sissinghurst Blue' and prevent it from becoming leggy, trim the tips lightly immediately after the flowers fade. Crucially, never cut back into the bare, leafless wood at the base, as the plant cannot regenerate from old growth and will be left with permanent bare patches.
How to Water
Water young plants regularly to help them establish, but once mature, Rosemary 'Sissinghurst Blue' is highly drought-tolerant. Only water during extended dry spells, allowing the soil to dry out completely between waterings to prevent the roots from rotting in damp conditions.
How to Plant
Plant Rosemary 'Sissinghurst Blue' in a warm, sunny position with free-draining soil. If your garden has heavy clay, dig in plenty of horticultural grit or plant it in a raised bed or terracotta container to ensure excess water drains away rapidly, mimicking its Mediterranean origins.












