Ideal Temperature for Cup plant

Images of Cup plant

Cup plant(Silphium perfoliatum)
Cup plant(Silphium perfoliatum)
Cup plant(Silphium perfoliatum)
Cup plant(Silphium perfoliatum)

Signs of Cold Stress in Cup plant

Symptoms

Cup plant tolerates cold well and flourishes optimally when temperatures exceed 60℉. In winter, maintain temperatures above 50℉. If temperatures drop below 40℉, while winter changes might not be obvious, spring may see reduced or absent sprouting.

Solutions

In spring, remove any sections that have not sprouted.

Signs of Heat Stress in Cup plant

Symptoms

In summer, Cup plant should be maintained below 75℉. When temperatures surpass 85℉, the plant's foliage may lighten, curl, become prone to sunburn, and in severe instances, the entire plant might wilt and dry out.

Solutions

Remove any sun-damaged and desiccated portions. Relocate the plant to a spot shaded from the midday and afternoon sun, or use a shade cloth. Water the plant in the morning and evening to keep the soil damp.

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