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Conebushes come from a Mediterranean climate with dry summers and mild winters. In a humid-summer, frosty-winter climate you move the pot to recreate those conditions. Cold tolerance varies by cultivar and bottoms out around 23 F (-5 C): light frost near freezing is fine, but a frost at 23 F can kill. In a mild-winter city it spends most winters outdoors under an eave and comes in only for cold snaps.
| Season | Location | Watering |
|---|---|---|
| Spring | Full sun | Soak once the surface dries |
| Summer | Bright shade under cover, with airflow | Only when fully dry, in the morning |
| Fall | Full sun | Soak once the surface dries |
| Winter | Sunny spot under an eave; porch or indoors on freezing nights | Two or three days after drying, in the morning |
Summer: rain cover and airflow
From the start of the rainy season until the heat breaks is the most dangerous stretch for a potted conebush. Weeks of rain keep the mix wet, and midsummer heat on top of that rots the roots. The plant handles heat itself fairly well, so prioritize dryness over sun. A gardener with one in the ground reported the rainy-season damp as more dangerous than winter frost.
- Move under cover before the rains Pick a spot where rain cannot reach but air flows: against the wall rather than the rail on a balcony, or an east-facing eave in a yard.
- Lift the pot for airflow underneath Set it on pot feet or a slatted stand and leave space between pots. On bare concrete the base overheats and drains badly.
- Clear debris from the base Fallen leaves and dead twigs trap moisture at the crown. Clean them out regularly.
- Screen hot afternoon sun Late-day sun scorches leaves and heats the mix. Use shade cloth or a spot that gets morning sun only.
Fall: back into the sun to color up
When daytime highs drop below about 86 F (30 C) and stay there, return the pot to full sun. Bract color depends on light and on the gap between day and night temperatures, so all-day sun from fall through winter is ideal. A plant potted in early fall goes into the sun as soon as it starts rooting. No fertilizer is needed now; if anything, a trace of a phosphorus-free feed.
- Out of the shade once the heat breaks Move it from the summer spot into full sun over a few days so the leaves adjust rather than scorch.
- Log the first color Note the day the first bracts show color. The date shifts with cultivar and position and becomes your benchmark.
Winter: out of frost and wind
In a mild-winter city, a sunny spot under an eave gets it through most winters outdoors. The risks are clear, still nights with radiation frost and dry, cold wind. When the forecast low dips below 32 F (0 C), pull the pot against a wall or onto the porch; below about 27 F (-3 C), bring it into a bright room. Leaves that freeze and thaw by morning are fine, but repeated freezes kill back the tips.
| Forecast low | Action | Why |
|---|---|---|
| Above 41 F (5 C) | Leave it in the sun | Bract color deepens |
| 32 to 41 F (0 to 5 C) | Under an eave or against a wall | Avoids frost settling |
| 27 to 32 F (-3 to 0 C) | Porch, or wrap in frost cloth | Radiation frost protection |
| Below 27 F (-3 C) | Bright window indoors | Tip dieback on tender cultivars |
Indoors, keep it away from heater drafts and in a sunny window by day. A warm room all winter produces soft, stretched growth.
Winter watering and indoor care
Roots slow in the cold and use less water. Wait two or three days after the surface dries, water in the morning, and let the surface dry by evening. Heated indoor air is dry and invites spider mites, so mist the undersides of the leaves, keeping the mist off the soil.
- Water in the morning Evening watering chills the roots overnight. On a sunny morning, water until it runs from the drainage holes.
- Mist leaf undersides indoors A few times a week, mist the undersides and check for pale stippling, the first sign of mites.
- Outside on mild days On sunny days above 50 F (10 C), set an indoor plant outside in the sun for the day. If that is a chore, a bright window is enough.
Recovering from frost damage and summer rot
Brown stem tips after a cold snap do not mean the plant is dead. Leave them until spring, then cut back only the dead part above a leafy node once new buds show you where live wood begins. A plant that dropped its lower leaves in summer heat should be dried out in airy shade and judged by whether it pushes new growth in fall. In both cases, do not feed and do not repot; those are the two things that stop recovery.
- Leave frost damage until spring Damaged tips shield the stems below. Cut only once new buds appear in spring and you can see what is alive.
- Dry out a rotted plant and wait If the stem tips are still green after leaf drop, it will come back. Withhold water until the pot is light and return it to sun once the weather cools.
- Change the spot next year The same spot tends to produce the same failure. Record when and where the damage happened and move the pot earlier next year.