Thompson & Morgan Hollyhock Antwerp Mixed - 1 Seed Packet

This decorative variety of hollyhock comes in a mixture of colourful pastel shades with unu-sual p...

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The Thompson & Morgan Hollyhock Antwerp Mixed is an excellent choice for gardeners looking to add height and vibrant pastel colors to the back of their borders. These plants are prized for their unique palmate foliage and notable resistance to rust, making them a reliable option for both novice and experienced growers; however, their significant height requires careful placement in sheltered, well-draining locations to prevent damage from wind.

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Model Part Number24271
BrandThompson & Morgan

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FAQs

When is the best time to sow Antwerp Mixed hollyhocks?

You can sow them in early spring (February-March) or late summer (September-October).

Do these seeds need darkness to germinate?

No, do not exclude light, as it is actually helpful for the germination process of these seeds.

How much space should I leave between plants?

You should plant them approximately 45cm (18in) apart.

What kind of soil do they prefer?

They prefer well-cultivated, well-drained soil in a sheltered, sunny position.

Can I grow these in heavy clay soil?

It is recommended to sow in late summer in a cool greenhouse and overwinter them if your soil is heavy, as this produces stronger plants.

How tall do they grow?

These hollyhocks can reach a height of up to 180cm (71in).

Troubleshooting

Seeds failing to germinate

Ensure the container was not placed in the dark, as light is required for germination, and verify the temperature remained between 15-20C.

Seedlings look weak or leggy

The plants likely need more light during the growth phase or were kept in a room that was too warm before being moved outdoors.

Plants falling over

Hollyhocks grow tall and may require staking in exposed areas; ensure they are in a sheltered position.

Pros and Cons

Pros

  • High resistance to rust diseases
  • Beautiful and diverse pastel color range
  • Attractive, unique fig-like palmate leaves
  • Easy for gardeners of all skill levels to sow and maintain
  • Ideal for providing height at the back of garden beds

Cons

  • Requires significant vertical space due to 180cm height
  • Not suitable for very windy or unsheltered areas
  • Sensitive to heavy or poorly drained soil types
  • Seedlings require careful handling and frost protection

Setup, Compatibility & Care

To begin, sow seeds between February and March or September and October using a free-draining, damp seed compost. Germination requires temperatures between 15-20C (59-68F) and exposure to light; cover seeds only with a fine dusting of vermiculite or compost. Place them in a propagator or sealed poly-thene bag for 14-21 days. Once seedlings are large enough, transplant them into 7.5cm pots and keep them in cooler conditions for 10-15 days before hardening off. Always ensure plants are moved outdoors only after all risk of frost has passed. Maintain a well-cultivated, sunny spot with good drainage for the best results.