Hollyhock 'Black Watchman'

Alcea rosea

How to grow Hollyhock 'Black Watchman'

  • Full Sun

  • Medium

After flowers are faded the plant can be cut above ground level and it will grow back. Flowers will open in fall.1

Try to plant in a location that enjoys full sun and remember to water moderately. Keep in mind when planting that Black Watchman is thought of as very hardy, so this plant will survive though longer winters with little or no damage. Ensure your soil is clay, sandy and loamy and has a ph of between 6.1 and 7.8 as Hollyhock is a weakly acidic soil to weakly alkaline soil loving plant.

Growing Black Watchman from seed

Look to ensure a distance 0.2 inches (0.5 cm) between seeds when sowing - bury at a depth of at least 0.1 inches (0.25 cm) deep.

By our calculations, you should look at sowing Black Watchman about 56 days before your last frost date.

Transplanting Black Watchman

Ensure that temperatures are mild and all chance of frost has passed before planting out, as Black Watchman is a very hardy plant.

Harvesting Black Watchman

Other Names for Hollyhock 'Black Watchman'

Hollyhock ‘The Watchman’, Sereno

Footnotes