Seed Swaps

Hollyhock 'Black Watchman'    

Alcea rosea

  • 7 plantings
  • 0 available for swap
  • 1 wanted
  • 5 stashed

Black Watchman is a popular variety of Hollyhock, which belongs to the Alcea genus (Alcea rosea 'Black Watchman'). Blooms appear in these approximate colours:   UP Maroon and   Brown. Leaves appear approximately as a   Office Green colour.

Attractive to bees, birds and butterflies. This heirloom may bloom the first year from seed if planted early in the spring. If planted later the flowers will come the next year.

This variety is a Flower that typically grows as an Biennial, which is defined as a plant that matures and completes its lifecycle over the course of two years. Black Watchman is known for its Erect habit and growing to a height of approximately 1.52 metres (4.94 feet).

As Black Watchman Hollyhock is a low maintanence plant, it is great for beginner gardeners and those that like gardens that don't need much overseeing.

This variety plant info is provided by the myfolia gardener's wiki. All details about Black Watchman have been kindly provided by our members.

How to grow 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. Use USDA Hardiness Zone 4 - 9 as your guideline for the appropriate climate for this plant. 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