How to Grow Delphiniums Pacific Giant Series
Delphinium elatum 'Pacific Giant'
Your complete guide to growing Delphiniums Pacific Giant Series.
📷 Wikimedia CommonsWhen to Plant Delphiniums Pacific Giant Series
Planting windows vary by USDA hardiness zone. Look up yours by ZIP code.
| Zone | Start Indoors | Direct Sow | Harvest |
|---|---|---|---|
| Zone 1 | May – June | July – September | — |
| Zone 2 | April – May | June – August | — |
| Zone 3 | April – May | June – August | — |
| Zone 4 | March – April | June – July | — |
| Zone 5 | March – April | May – July | — |
| Zone 6 | March – April | May – July | — |
| Zone 7 | February – March | April – June | — |
| Zone 8 | February – March | April – June | — |
| Zone 9 | January – February | March – May | — |
| Zone 10 | January | February – April | — |
| Zone 11 | January | January – March | — |
| Zone 12 | January | January – March | — |
| Zone 13 | January | January – March | — |
Companion Plants for Delphiniums Pacific Giant Series
✓ Good companions
Thrives in partial shade created by tall delphiniums and adds textural contrast
Provides ground cover and contrasting flower shape while sharing similar moisture needs
Repels pests and provides low-growing complement to tall delphinium spikes
Creates dramatic height variation and both are classic cottage garden plants
Similar care requirements and creates layered cottage garden effect with complementary flower forms
Similar growing requirements and extends the blue color palette in the garden
Bloom timing complements delphiniums and both prefer rich, well-drained soil
Delphiniums provide natural support structure and both benefit from similar growing conditions
✗ Keep away from
Produces juglone toxin that can severely damage or kill delphiniums
Compete for similar nutrients and can attract pests that also damage delphiniums
Allelopathic compounds can inhibit delphinium growth and establishment
