Dahlia merckii - GardensDB [ Skip to content ](#main) Browse [ ![](/images/leaf_icon.svg) Gardens**DB** ](https://gardensdb.com) [ Gardens ](https://gardensdb.com/gardens) [ Shows ](https://gardensdb.com/shows) [ Studios ](https://gardensdb.com/studios) [ People ](https://gardensdb.com/people) [ Search gardens, designers, shows… ](https://gardensdb.com/search) [ Log in ](https://gardensdb.com/login) [ Register ](https://gardensdb.com/register) [ ](https://gardensdb.com/search) Discover - [ Home ](https://gardensdb.com) - [ Gardens ](https://gardensdb.com/gardens) - [ Plants ](https://gardensdb.com/plants) - [ Shows ](https://gardensdb.com/shows) - [ Events ](https://gardensdb.com/events) - [ 360° tours ](https://gardensdb.com/360-tours) - [ Trails ](https://gardensdb.com/trails) People & studios - [ People ](https://gardensdb.com/people) - [ Studios ](https://gardensdb.com/studios) - [ Books ](https://gardensdb.com/books) - [ Jobs ](https://gardensdb.com/jobs) Organisations - [ Sponsors ](https://gardensdb.com/sponsors) - [ Charities & non-profits ](https://gardensdb.com/charities) - [ Collectives ](https://gardensdb.com/collectives) - [ Companies ](https://gardensdb.com/companies) - [ Education institutions ](https://gardensdb.com/education-institutions) - [ Nurseries ](https://gardensdb.com/nurseries) Account - [ Log in ](https://gardensdb.com/login) - [ Register ](https://gardensdb.com/register) Follow [ gardensdb on Instagram (opens in a new tab)](https://www.instagram.com/gardensdb/) Discover - [ Home Today's highlights ](https://gardensdb.com) - [ Gardens Show gardens, catalogued ](https://gardensdb.com/gardens) - [ Plants What was planted, and who used it ](https://gardensdb.com/plants) - [ Shows Horticultural shows ](https://gardensdb.com/shows) - [ Events Festivals, courses & open days ](https://gardensdb.com/events) - [ 360° tours Step inside, long after the show packs up ](https://gardensdb.com/360-tours) - [ Trails Curated routes through the gardens ](https://gardensdb.com/trails) People & studios - [ People Designers, judges, growers ](https://gardensdb.com/people) - [ Studios Design practices ](https://gardensdb.com/studios) - [ Books Recommended reading ](https://gardensdb.com/books) - [ Jobs Roles in the industry ](https://gardensdb.com/jobs) Organisations - [ Sponsors Organisations that back the gardens ](https://gardensdb.com/sponsors) - [ Charities & non-profits Causes behind the gardens ](https://gardensdb.com/charities) - [ Collectives Groups & community projects ](https://gardensdb.com/collectives) - [ Companies Suppliers & contractors ](https://gardensdb.com/companies) - [ Education institutions Schools, colleges & universities ](https://gardensdb.com/education-institutions) - [ Nurseries Plant suppliers & growers ](https://gardensdb.com/nurseries) [ Submit a garden ](https://gardensdb.com/gardens/submit) [ About GardensDB ](https://gardensdb.com/help) [ gardensdb on Instagram (opens in a new tab)](https://www.instagram.com/gardensdb/) [Plants](https://gardensdb.com/plants) / Dahlia merckii ![Dahlia merckii](https://cdn.gardensdb.com/media/c8034c89-d809-48af-b15a-cb610bad274c/conversions/dahlia-merckii-hero.webp) Plant Dahlia merckii ================ Dahlia Planted in 1 show garden on GardensDB. 1 Garden 2 Designers 1 Studio How to grow it Happiest in full sun on loam or sand that is moist but well-drained. -------------------------------------------------------------------- Size at maturity 0.5–1 metres Max height 0.5–1 metres Max spread 1–2 years To maturity Aspect Aspect: North-facing, East-facing, South-facing, West-facing N E S W Any aspect Happy facing any direction Position Full sun (suitable) Partial shade (not suitable) Full shade (not suitable) Exposure Sheltered (suitable) Exposed (not suitable) Moisture Moist but well-drained Soil Chalk (not suitable) Clay (not suitable) Loam (suitable) Sand (suitable) Soil pH Acid (suitable) Neutral (suitable) Alkaline (suitable) Hardiness H3. Half hardy Half hardy, unheated glasshouse or mild winter (-5°C to 1°C) H1a H1b H1c H2 H3 H4 H5 H6 H7 Where it was planted 1 garden ---------- - ![A naturalistic wildlife pond with a wooden boardwalk, surrounded by lush green plants, pink flowers, large boulders, and stacked terracotta tiles.](https://cdn.gardensdb.com/media/a19c447a-892b-4941-92e8-33e70fe83888/conversions/PXL_20260722_101439059-gallery.webp) [](https://gardensdb.com/gardens/the-rhs-pollywiggle-garden) Feature Garden 360° tour 360° tour available RHS Sandringham Flower Show 2026 The RHS Pollywiggle Garden Joe Carey, Laura Carey Who uses it Designers & studios ------------------------- The people and studios credited on the gardens above, and how many gardens they used this plant in. ### Designers 2 - [ 1 garden ![Joe Carey](https://cdn.gardensdb.com/people/joe-carey/profile_photo.webp) #### Joe Carey Carey Garden Design Studio ](https://gardensdb.com/people/joe-carey) - [ 1 garden ![Laura Carey](https://cdn.gardensdb.com/people/laura-carey/profile_photo.webp) #### Laura Carey Carey Garden Design Studio ](https://gardensdb.com/people/laura-carey) ### Studio 1 - [ 1 garden ![Carey Garden Design Studio](https://cdn.gardensdb.com/studios/carey-garden-design-studio/logo.webp) #### Carey Garden Design Studio ](https://gardensdb.com/studios/carey-garden-design-studio) Good company Often planted with -------------------- Plants that share a plant list with Dahlia merckii, ranked by how many gardens combine them. 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