How to Grow Costa Rose II
Antirrhinum majus
Your complete guide to growing Costa Rose II.
📷 Wikimedia CommonsWhen to Plant Costa Rose II
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 Costa Rose II
✓ Good companions
Deters aphids, thrips, and rose chafers with strong sulfur compounds
Repels ants, aphids, and rodents while attracting beneficial insects
Repels aphids and Japanese beetles while improving soil with sulfur compounds
Natural fungicide properties help prevent black spot and powdery mildew
Repels aphids, moths, and other pests while attracting beneficial pollinators
Deters nematodes, aphids, and whiteflies through natural pest-repelling compounds
Acts as trap crop for aphids and cucumber beetles, draws pests away from roses
Repels carrot flies, cabbage moths, and other harmful insects
✗ Keep away from
Produces juglone toxin that inhibits rose growth and can cause wilting
Heavy feeders that compete for nutrients and may stunt rose growth
Compete for nutrients and water while creating excessive shade that weakens roses
