- Rose Sharon Plants
- How to Plant a Rose of Sharon Hedge
- How Fast Does Rose of Sharon Grow?
- Soil Conditions
- Decorative Qualities
- Invasive Qualities
- How to Care for a Rose of Sharon
- How to Identify Rose of Sharon Plants
- Do Rose of Sharon Roots Cause Damage?
- The Best Time to Plant Rose of Sharon
- How to Prune Rose of Sharon
- How to Prune Rose of Sharon Bushes
- Rose of Sharon Facts
- What Is the Best Fertilizer for Rose of Sharon?
- How to Germinate Seeds from Rose of Sharon Trees
- How Fast Does a Rose of Sharon Grow?
- How to propagate rose of sharon shrubs so you can enjoy their beautiful blooms all over your garden every summer!
- How I Learned to Propagate Rose of Sharon
- How to Propagate Rose of Sharon
- How to Propagate Rose of Sharon to Get and Give New Plants
- Rose of Sharon cutting in Fall?
Rose Sharon Plants
hibiscus image by photlook from Fotolia.com
How to Plant a Rose of Sharon Hedge
Rose of Sharon (Hibiscus syriacus) is a hardy hibiscus that is often grown into a hedge in many different climate zones. As far north as USDA climate zone 5 (Iowa and southern Illinois), gardeners value this plant for its pretty summer flowers and attractive foliage that you can prune to whatever shape you want.
Determine a sunny location for your Rose of Sharon hibiscus plants and then measure the length of the planting area. This plant needs 4 feet between plants, so plan accordingly before visiting the nursery. For example, if you want a 20-foot hedge, purchase five plants.
Measure 4 feet between planting holes and then mark their locations with anything handy, like a trowel or bucket.
Dig holes in the places you marked. Make sure the holes are larger than your plants’ rootballs and add in one large shovelful of organic compost, one cup of Perlite or vermiculite and one shovelful of peat moss into each hole. Thoroughly mix these ingredients into the soil.
Plant your Rose of Sharon plants into the holes you prepared and then backfill with the soil you dug out. Pat the soil down firmly around each plant and water them well.
Trim your Rose of Sharon plants into the hedge configuration you want when they begin to send out rapid new growth at the beginning of spring.
How Fast Does Rose of Sharon Grow?
Trees planted in partial shade may grow at a slower rate and the amount of pruning may also affect the size of the tree. Pruning is encouraged to produce a fuller tree with more branches and bloom and to discourage branch breakage.
Rose of Sharon may grow at a slower rate if planted in compacted or clay soil, as the root system may have a more difficult task of developing. Wet soils with poor drainage may encourage disease, also creating a smaller or thinner tree.
Rose of Sharon can be added to a landscape as a single ornamental tree or can be planted as a hedge for the look of a line of shrubs. This tree provides a lush amount of foliage and can be very attractive along your property line.
Rose of Sharon can be very invasive, as hundreds of seeds are created and dropped to the soil after each blooming season. It is advisable to pull young seedlings as soon as they sprout before they have an opportunity to create strong roots if you do not want many new trees to grow.
How to Care for a Rose of Sharon
Prune the rose of Sharon in the early spring before the growing season begins. When rose of Sharon is not pruned, the shrub produces many small blooms. Pruning results in larger blooms, but fewer in number.
Water rose of Sharon bushes generously during the growing season. Although established plants withstand drought conditions, watering helps keep the rose of Sharon blooming throughout the summer.
Mulch rose of Sharon shrubs before heavy frosts hit the growing area. Remove any dead or diseased stems and branches while mulching. Also remove any starts growing at the base of the shrub to keep the bush from becoming invasive. These starts may be transplanted to other areas of the landscape.
Propagate rose of Sharon bushes by stem cuttings taken in early spring before new growth forms. The rose of Sharon also grows from seed, but stem cuttings speed up propagation.
Treat any leaf disease or insect infestations immediately with a quality fungal powder or insect repellent. According to Ohio State University, older rose of Sharon shrubs become susceptible to trunk cankers. Left untreated, the canker may cause the shrub to die.
How to Identify Rose of Sharon Plants
Look at the size of the planting. Some consider Rose-of-Sharon a shrub, and others may consider it a tree. Rose-of-Sharon grows from 8 to 10 feet tall and spreads from 4 to 10 feet wide.
Check its bark. Rose-of-Sharon bark is thin with thin branches throughout. Its color is gray.
Examine its flowers. Rose-of-Sharon flowers are showy, 4 inches wide and can be either single or double. They are a shade of red, white, purple or pink. Also, a big identification indicator is that Rose-of-Sharon blooms throughout summer, unlike similar plantings.
Look at the foliage. Rose-of-Sharon leaves are medium green, 3 inches long and have three distinct, shallow lobes that are shaped like an egg.
Stand back and look at the overall shape of the plant. Rose-of-Sharon is vase shaped.
Do Rose of Sharon Roots Cause Damage?
The roots of Rose of Sharon, a flowering tree or shrub that can reach 10 feet in height, generally won’t cause damage because they grow just below the surface of the soil. But as with any tree or shrub that size, it’s a good idea to not plant a Rose of Sharon directly over, or adjacent to, drain pipes or septic tanks.
The Best Time to Plant Rose of Sharon
The National Gardening Association recommends planting Rose of Sharon (Hibiscus syriacus) in the spring or fall. You can also take cuttings from the shrub. Plant new cuttings in late spring and more mature ones in the summer, according to Fine Gardening’s website.
How to Prune Rose of Sharon
Prune Rose of Sharon in late winter or early spring. Flowers form on new growth, usually in May or June. Early pruning, therefore, stimulates shorter new growth without diminishing blooming.
Cut thin branches back to the heavy branches from which they grow. New shoots will form, shorter than what you have pruned, and multiple new shoots will make shrubs bushier.
Trim heavier main branches back only if growth is seriously out of control. Main branches can be cut back to 2-3 feet in height. Early spring remains the best time to conduct this major reshaping of your shrub.
New growth can be thinned after blooming for appearance, but major pruning should be done while the shrub is still dormant. Dead branches can be removed at any time.
How to Prune Rose of Sharon Bushes
Note any dead, diseased or damaged growth on your Rose of Sharon. Dead growth will not move with the wind and will feel brittle. Damaged or diseased growth bears physical discoloration, wounds or marking.
Cut off this unhealthy wood at its base using pruning tools. Choose anvil pruners for growth 3/4-inch thick or less and lopping shears for thicker growth. In between each cut, spray your tools with disinfectant spray to prevent any bacteria from infecting healthy wood.
Rejuvenate the Rose of Sharon by pruning away up to one-third of the oldest branches. Remove the branches at their base. Choose old and tall growth, which you can identify by its thicker stems.
Thin heavy areas of the bush by trimming branches back to a Y intersection. Thinning prevents Rose of Sharon bushes from becoming too bushy and improves air circulation, which keeps the bush healthy.
Rose of Sharon Facts
Rose of Sharon’s large flowers bloom from July through September in a range of colors, including white, purple, red and bicolor. The green leaves provide little autumn color. Thin, grey bark covers the multiple trunks.
Though often propagated through cuttings, it also grows well from seed. Established plants self-sow easily.
Mature Althea reaches heights up to 12 feet with widths reaching 10 feet. The upright growth creates a vase-shape unless pruned into a tree form.
Rose of Sharon requires full sun to partial shade. While it performs best in fertile, moist and well-drained soil, the plant’s adaptability allows it to grow in almost any soil. It survives in USDA zones 5 through 8.
Prune or trim in the early spring to shape the shrub. Amend the soil with compost and spread a 3-inch layer of mulch before the summer heat. Water the plant during extended dry spells.
What Is the Best Fertilizer for Rose of Sharon?
The Rose of Sharon (Hibiscus syriacus) does not require special fertilizer because it grows in all soil conditions. Too much fertilizer can cause bud drop or produce growth that attracts aphids.
How to Germinate Seeds from Rose of Sharon Trees
Fill a shallow pan 1 to 2 inches full of seed starter mix or well-draining potting soil.
Gently push each seed ¼ inch below the surface of the soil and cover with dirt. Leave ½ inch of space between each seed for optimal growth.
Use a spray bottle to fully mist the soil with purified water. Regularly mist seeds to prevent drying out during germination.
Place pan in a location with temperatures between 68-70 degrees Fahrenheit and indirect sunlight. Seedlings should emerge within 10 to 20 days.
How Fast Does a Rose of Sharon Grow?
The Rose of Sharon grows about 13 to 24 inches per year, depending on soil, drainage, water, light and exposure, according to the Arbor Day Foundation.
How to propagate rose of sharon shrubs so you can enjoy their beautiful blooms all over your garden every summer!
Rose of sharon is one of those plants that just say “summer” to me. The blooms look almost tropical and come out every year when the weather is at its hottest and we’re right in the thick of the lazy, hazy, crazy days of summer. The really fun part is that they’re so easy to grow that I almost forget that they’re even there until they’re suddenly in full bloom. It’s such a great surprise every year. Chances are, if you own one of these plants, you already know about this super simple way to propagate rose of sharon. If you never realized just how simple it is to create dozens of these plants though, I thought I’d better let you know!
How I Learned to Propagate Rose of Sharon
I only came to know about this method of propagation because this is how I ended up with my rose of sharon in the first place. I was given a tiny plant that had been propagated this way and I was so amazed at how quickly it grew. It had several blooms that first year that I put it in the ground and it was what you could call a full sized shrub within about two years. It’s been a few more years now and it’s about eight or nine feet tall!
How to Propagate Rose of Sharon
The key first step comes at the end of the season in the fall. Your shrub will fill up with seed pods and this is obviously going to be very important to the whole process. Wait until the seed pods are fully-formed and look like they’re about to burst. Then, very carefully, without disturbing the plant, you need to make your way out to the garden and….do nothing. Ha!
Just let the seeds fall and do what they will. 🙂 Here you can see some of our seed pods from last year still on the plant. I leave them all winter because they actually look really beautiful in the snow.
The next very important step comes the next spring, when again, you want to wait until just the right moment when you start to see those bright green baby leaves forming on your shrub. At this point you want to very carefully, and very gently…do nothing.
Avoid weeding an area of about two feet around the bottom of your rose of sharon and you’ll soon start to see lots and lots of little green rose of sharons popping up all over the place. Again, it’s absolutely imperative that you do nothing. 🙂
Allow them to continue to grow until the end of the summer. In the fall, you should have plants that are at least six to eight inches tall that you can dig up and move to new locations around your garden. If you’ve never tried this before, you’ll be amazed to see how quickly these will grow and fill in year after year.
So that’s all there is to it! I’m hoping to add of a few of these to the front of our house this year to add a little extra interest during those late summer weeks. I think we have about 200 little shoots growing so far, so I may need to find a few other homes for them as well. 🙂
Do you grow rose of sharon in your garden?
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How to Propagate Rose of Sharon to Get and Give New Plants
Nothing beats the beauty of a Rose of Sharon when it’s in bloom during the late summer and autumn. Rose of Sharon, Hibiscus syriacus, is a deciduous shrub also known as Althea or Chinese hibiscus. You can choose varieties with blooms that are single or double in shades of red, pink, white, purple, blue or lavender. Most varieties grow 8 to 12 feet tall and 6 to 10 feet wide, according to the National Gardening Association. You can easily start new plants from your Rose of Sharon by taking cuttings in late spring or early summer.
Fill your 1-gallon pots with the soil-less plant mix.
Clip off branches from your Rose of Sharon that are about pencil width, or a little smaller, and have several leaves or leaf buds. Cut the stems 4 to 6 inches long. Cut more stems than you want, since they won’t all sprout into new shrubs.
Remove the leaves from the bottom half of each cutting. Dip the end of the stem in rooting hormone. Push the bottom third to half of each stem into your gallon container. You can put up to four stems in a single pot.
Place a piece of clear plastic over the top of each pot, creating a tent shape. Place a saucer or tray under each pot and water it immediately. Leave any runoff in the tray so the soil can draw it up and remain moist to encourage the rooting process.
Put your pots in a spot with shade or indirect light. Remove the plastic in seven days. Check the pots every few days to make the potting mixture remains moist. Add more water if needed, but do not allow the pots to stand in water.
Check the cuttings for roots in one to two months. Gently pull on each stem; if you feel resistance, that means roots have formed. You also should see new leaves form on the branch stems that have rooted.
Transplant the rooted cuttings into separate containers and allow them to grow larger before planting them in the garden.
Rose of Sharon cutting in Fall?
For the larger type of this plant / shrub called Hypericum, Rose of Sharon or St Johns Wart depending on where you live and your locality. you need to take the cuttinga between July- September. You take the cutting material about 5-6 inches long, make sure you have a heel on the the bit you remove from the parent plant ( heel is when you tub away in a downward tug, a small part of the parents stem is attached to the new cutting)
With a really sharp knife, razor blade or craft knife, you trim UP the heel part as you dont want a large piece at the bottom of the cutting encase this causes rot,, dip the bottom into your rooting powder and shake off any excess, too much powder is no use as it will prevent contact with the soil, then insert the cutting into a small pot of compost with added grit / sand or perlite that helps drainage, air to be allowed into the soil mix and also helps with rooting as the soil is more open.
Water the cuttings and make sure the soil don’t dry out store the cuttings in a sheltered place either indoors or use a plastic bag to make a tiny greenhouse around the pot, stick a couple of small caned into the pot to help keep the plastic from falling onto the foliage.
Before I finish I forgot to mention that cuttings root better IF set around the inside edge of the pot and you can insert 4-5 cuttings at one time in the same pot, use a pencil to stick into the soil and this makes it easier to place the cuttings in the pot, always gently firm the soil around the cutting before you water, I like to water cuttings from the bottom by placing the pot into a saucer or bowl of water and allow the natural intake of water to soak into the soil, allow the excess water to drain before you place them back into the sheltered area you store them, NOT in BRIGHT sunlight but good light.
Hope all this helps you out and wishing you great success.