How To Grow Hollyhocks & Care Guide

Many gardeners who grew up with hollyhocks (Alcea rosea) in their yards want to re-create the showy blooms they saw in their childhood.

There are bloom stalks on hollyhocks that can reach a height of 9 feet (2.7 meters).

A vertical aspect can be added to your garden with the help of these trees. In this article, we’ll go over some helpful hollyhock-growing advice.

How to Plant Hollyhocks

The first step is to learn how to properly plant hollyhocks. Hollyhocks prefer moist, rich, well-drained soil that receives plenty of sun.

Planting this flower in soil that’s too dry is a common blunder among rookie hollyhock gardeners.

A week before the final frost is a good time to grow seeds outside. Wait two to three weeks after the last frost before planting seedlings outside.

Only 1/4-inch (.6 cm) deep planting is necessary for hollyhock seeds. Ideally, Hollyhock plants should be spaced around 2 feet apart.

If you like, you can plant hollyhocks with their roots still attached.

How to Grow Hollyhocks

While hollyhocks require little attention once they’ve been planted, there are a few things to keep in mind. Hollyhock care suggestions are provided here.

First and foremost, hollyhocks are annuals. Because of this, most kinds will barely last for two to three years.

Removing fading hollyhock flowers as soon as they appear will help to increase their life expectancy. For non-tropical regions, trimming them back and mulching will help as well.

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Because hollyhock blooms are so easy to reseed, they are one of the main advantages of planting them.

The hollyhock blossoms may only last a few years, but with careful care, they will continue to bloom for many more years to come.

Hollyhocks might also benefit from spring fertilization or compost.


  • The dramatic and towering hollyhocks provide a dramatic backdrop for the more modest perennials.
  • Make your garden a haven for hummingbirds and butterflies.
  • Begin by planting friends like dahlia, clematis, and Shasta daisies as well as shrub roses and climbing roses like sweet William and black-eyed Susan.
  • In order to disguise their occasionally unsightly legs, place denser plants in front of them.
  • To avoid having to move hollyhocks because of their extensive taproots, place them where they won’t be disturbed.

Tips on Hollyhocks and Their Problems

However, Hollyhocks are not without their drawbacks. Rust should always be watched out for when cultivating hollyhock flowers.

However, the upper leaves may also be affected by rust. Tips for hollyhocks to keep rust at bay include:

Remember to water from below Treatment with a fungicide Make sure the plant has good air circulation

All of these tips should help but will probably not eliminate the rust problem.

Your best bet is to keep rust contained to the lower branches so the problem will only affect the leaves and not the flowers.

Now that you know how to plant hollyhocks, as well as how to grow hollyhocks, you can grow these wonderful flowers in your garden.

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Growing hollyhocks in your garden will add some drama and exciting height.

How to propagate hollyhocks

Sprouting seedlings of hollyhocks is a breeze to cultivate. Using peat-free seed compost and watering it thoroughly, prepare a seed tray and allow the water to run out.

Large enough seeds allows for a uniform distribution on the compost surface.

Set them apart by about a centimeter. Over the seeds, sift the seed compost. You want to keep the tray somewhere with a temperature range of 15-20°C.

Germination should begin to show in 2 weeks. Pricking out the plants can take up to another five weeks.

In June, the plants will be ready for planting, but they won’t flower until the following year.

Alternately, you can start seeds in the spring and then transplant them into the ground in the fall. The following year, these plants should begin to produce flowers.

Perennial hollyhock seeds, which require a time of cold to germinate, should be sown right immediately if you gather them from ended flowering hollyhocks.

It is advisable to store biennial seed in a cool, dry place for the next year.

Hollyhock varieties to grow

  • Alcea ‘Rosea Nigra’ – deep maroon flowers from June to September. Reaches a height of 2m
  • Alcea ‘Halo Mixed’ – a mix of white, purple, and pink single flowers held on 2m high stems. Flowers from June to July
  • Alcea ‘Chater’s Double Icicle’ – a pure white double with flowers that resemble puff palls. Flowers from July to September. Reaches a height of 1.5m
  • Alcea ‘Black Knight’ – nearly black, single flowers anytime from June to September. Reaches a height of 2m
  •  Alcea rosea ‘Crème de Cassis’ – purple semi-double flowers with a white rim. Flowers from June to September. Height 2m
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