As the plant reaches maturity, you shouldn’t need to fertilise anymore (although you can). When you first plant hollyhock, enriching the soil with a slow-release fertiliser can help in its growth. Early in the summer, before they have been affected by the weather, these erect blooms likewise exhibit their greatest appearance. Hollyhock is particularly susceptible to rust in extremely hot and muggy conditions, and the situation usually gets worse as the summer wears on. Growing conditions call for daytime temperatures of 70☏ or higher and evening lows of at least 60° to 65☏. These towering flowers will grow on soil that is neutral, acidic, or alkaline, thus pH is not a key factor. While hollyhock will grow in clay as well, it prefers a location with well-drained soil. Hollyhocks are tolerant of a wide range of soil types. Hollyhocks need rich, wet soil that drains well. Hollyhocks can tolerate some shade as long as they get at least six hours of direct sunlight each day, but the more direct sunlight they get, the more robust your hollyhock flower blossoms will be. Make sure you have a sunny garden bed because hollyhocks do best in full sun, whether they are growing outside or inside. Avoid soaking the foliage when you are watering doing so can cause damaged leaves. They are quite drought tolerant after they have established themselves, though. Place hollyhocks in a location where self-seeding won’t be an inconvenience because, if left to their own devices, they will do so effortlessly.įor hollyhock seedlings or plants, provide regular irrigation and maintain soil moisture. Provide support in the form of a fence, wall, trellis, or stake to shield them from wind damage due to their height. Plant in a location with full to partial light and good drainage. Remember that some plants are biennials and might not bloom until their second year. After the final frost, seedlings can be transplanted outdoors two to three weeks later. 9 weeks before the last average frost date, start indoor seedlings. Because of their lengthy taproots, hollyhocks should be started indoors in tall, separate pots and transplanted as soon as possible to prevent damage. About 1/4 inch deep and about 2 feet apart, sow them. Here’s how and when to do it.Ī week before the final frost, seeds can be sown immediately outside. Hollyhocks can be easily started from seed both indoors and outdoors. The fruit is a schizocarp, a seed-containing dry disc that is divided into over 15 sections. The leaves of hollyhocks are big, rough, and palmately shaped. From top to bottom, the long spikes are completely encircled with blossoms. They bloom on long spikes and have a thin or no stalk.īlue, pink, purple, red, white, yellow, and even black are just a few of the many colours that hollyhocks may be found in. The upper portion of the stalk bears solitary or double, cup-shaped flowers that are at least 7.5 cm (3 inches) across. The leaf blades are carried on long petioles and may have lobed edges or teeth. Often, the herbage is covered in hairs that resemble stars. Hollyhocks are tall, unbranched plants that can be annual, biennial, or perennial. Blue, Orange, Pink, Purple, Red, White, Yellow
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