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Quick Guide
- Fragrant blue flowers, May to June
- Compact evergreen rounded shrub
- Full sun, well-drained soil preferred
- Attracts bees and butterflies
- Hardy H4 shrub for UK gardens
Ceanothus 'Blue Diamond' is a compact, bushy evergreen shrub producing abundant fragrant spheres of vibrant blue flowers from late spring through early summer. The small, glossy, dark green leaves remain attractive year-round, creating a dense, rounded mound 1–1.5 metres high.
Plant in full sun in a sheltered position with well-drained soil, ideally south- or west-facing. This Californian lilac tolerates lime-based soils but may yellow on shallow chalk. Water regularly during establishment but avoid waterlogging. Prune immediately after flowering, cutting back flowered shoots by one-third to one-half to maintain compact form.
Excellent for wildlife gardens, borders, and coastal settings where it reliably attracts bees and butterflies.
Plant Guide
Position in full sun, sheltered from cold winds, in fertile, well-drained loam or sandy soil. Tolerates lime but avoid shallow chalk soils. Water regularly, especially when young; allow soil to dry slightly between waterings and avoid prolonged waterlogging. Feed lightly in spring after pruning. Prune immediately after flowering (June), cutting back long flowered shoots by one-third to one-half. Susceptible to scale insect and honey fungus on poorly drained sites. Hardy to H4 throughout most of the UK.
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EAN code012500
- Ultimate Height1-1.5m
- Ultimate Spread1-1.5m
- Flower ColourBlue
- Foliage ColourDark Green
- ScentFragrant
- SunlightFull Sun
- UK Hardiness ZoneH4
- Care GuideLow maintenance
- Season of InterestYear-round
- Growth RateModerate
- Drought TolerantYes - Once Established
- Award of Garden MeritNo
- Bee FriendlyYes
- Pet FriendlyYes
- Soil TypeWell drained
- Soil PHNeutral
- Pot Size Litre5
Delivery Areas
We deliver within the M25 area of London. For deliveries of Pots & Planters outside this zone, we may be able to help on a case-by-case basis — please contact our sales team at [email protected]. You are also welcome to visit our garden centre in Kentish Town, where our team will be happy to help in person.
Delivery Access
We offer kerbside delivery only and cannot deliver to upper floors. Please contact us if you have any special requirements.
Delivery Costs & Delivery Day
Delivery charges are based on postcode zone within the M25. Enter your postcode at the top of this page to see your zone and cost, or check at checkout. You can also select your preferred delivery day at checkout.
Delivery Timeframes
We aim to deliver orders within 2–4 working days. During peak seasons, such as Christmas, delivery times may vary slightly due to increased demand. We will keep you informed at every stage.
Third-Party Couriers
For London postcodes outside a 5-mile radius of our Kentish Town garden centre, we may occasionally use a third-party courier for delivery. In these cases, we try our best to still deliver the items in the requested delivery time slot but please be aware that occasionally this may not always be possible and is out of our control.
Delivery Discrepancies
Please check your order as soon as it arrives. If there is any discrepancy — such as a missing, incorrect, or damaged item — please contact us within 48 hours of delivery so we can put things right. After this time, we will assume the order was received complete and in good condition. We are unable to take responsibility for damage that has occurred after this period.
Click & Collect
We encourage you to collect from our garden centre in Kentish Town — it saves on delivery costs and gives you the chance to see our full range of plants and products in person.
All Click & Collect orders must be collected within 7 days of being ready, unless a later date has been arranged with us in advance. If an order is not collected within this time, it will be cancelled and a refund issued.
Returns Policy
If you need to return an item, please contact us within 14 days of receipt to arrange a return or exchange. Products must be in their original condition and packaging. Plants may be non-refundable unless they arrive damaged or defective.
Items bought in-store or collected can be returned directly at the garden centre. If you would like us to collect a return and it is in good condition (e.g. you have changed your mind), it must be in its original condition, and the same delivery cost will apply for the return.
Plants marked as reduced for end-of-season clearance are non-refundable, as they are sold specifically to clear stock. This does not apply to special offers or multibuy promotions, which are eligible for returns as per our standard terms.
Questions about delivery or returns? Email [email protected] or call +44 (0) 20 7284 4999.
| Located in Kentish Town, London, Boma garden centre is proud of its vision to transform the city into an urban paradise. The garden centre has created a plant lover's paradise, a place where you can relax, unwind and de-stress among the foliage and flowers. The Webshop makes it easier to order online if you can't get to the garden centre, with nationwide delivery. But we encourage plant lovers to pop in for a visit and chat with the team. |
Creating an urban paradise
Our dream is to transform urban living into a plant lovers' paradise. Making our neighbourhoods a wonderful place is good for our wellbeing and more friendly to the environment. A shared vision that gets us out of bed in the morning.
We've curated a botanical sanctuary
Our team of horticulturists planned our garden centre to show plants in their natural habitat, with inspirational displays. Looking for plants is like taking a walk in a botanical sanctuary.
And for those that consider our canine friends an essential part of life, bring your best mate along. Hopefully, they'll get along with our house cat Blue Bell.
It so happens we stock some fabulous plants
Our garden centre specialises in rare specimen plants beyond the common garden varieties. We also stock everything you need to cultivate your dream garden, home and office, with the largest range of plants, pots and containers in North London. Apparently, visitors consider us The gardener's garden centre.
Recommended by Customers
Buy Ceanothus thyrsiflorus 'Blue Diamond' (Pot Size 5L) Californian Lilac at The Boma Garden Centre in Kentish Town, London. Visit our garden centre in London and check our wide range of plants & gardening products. We also offer many other products in our webshop. We look forward to seeing you soon!