Oakleaf hydrangeas (Hydrangea quercifolia) are native to the southeastern United States and are valued for their large clusters of flowers and oak-like leaves. A lack of blooms is usually caused by improper pruning practices or inadequate water. Both can be remedied with ease.
- 1 What do you do when hydrangeas don’t bloom?
- 2 How do you fertilize oakleaf hydrangeas?
- 3 How do I get my oakleaf hydrangea to bloom?
- 4 What is the best fertilizer for oakleaf hydrangeas?
- 5 Why are my hydrangeas not leafing?
- 6 Why is my lacecap hydrangea not flowering?
- 7 When should I fertilize my oakleaf hydrangea?
- 8 Are Epsom salts good for hydrangeas?
- 9 Are coffee grounds good for hydrangeas?
- 10 What happens if you don’t prune hydrangeas?
- 11 Should you deadhead oakleaf hydrangea?
- 12 Should I cut back my oakleaf hydrangea?
What do you do when hydrangeas don’t bloom?
If you have a hydrangea that won’t flower, you may have pruned it back too far the year before. Often, hydrangeas that aren’t producing flowers have been pruned in early summer and late winter.
How do you fertilize oakleaf hydrangeas?
To encourage healthy growth, fertilize your oakleaf hydrangea each spring with a general-purpose garden fertilizer and top dress with fresh compost. Unlike mophead-style hydrangeas, oakleaf hydrangeas won’t change their flower color based on soil acidity, so there’s no need to monitor or alter the pH of your soil.
How do I get my oakleaf hydrangea to bloom?
Dig 2 to 4 inches of compost, moistened peat moss or manure into the soil to a depth of 8 inches prior to planting oakleaf hydrangea. These amendments improve drainage and add nutrients, which can promote healthy growth and blooms.
What is the best fertilizer for oakleaf hydrangeas?
Oak leaf hydrangea performs best in shade with fertile, moist soil, though it does tolerate sun when given proper care.
- Perform a soil test using a kit available at hardware stores, garden centers and through university extension offices.
- Adjust your soil pH as needed.
- Use a 10-10-10 granular fertilizer.
Why are my hydrangeas not leafing?
If the stems die off and do not leaf out, the plant may generate stems from the crown/base. Apparently though, it has not quite decided what to do so -leaf out or generate new stems- so wait some more time. A hydrangea shrub that has not leaf out by late May probably did not make it.
Why is my lacecap hydrangea not flowering?
There are 2 major reasons Lacecap Hydrangeas (Hydrangea macrophylla) cold damage or improper pruning. Hydrangeas love morning sun and afternoon shade. Also they will grow in shaier conditions, it does inhibit blooming. make sure your hydrangeas get half a day of sun.
When should I fertilize my oakleaf hydrangea?
Feed your oakleaf in early spring each year with the same fertilizer or a flower-enhancing fertilizer such as Pennington UltraGreen Color Blooms & Bulbs Plant Food 15-10-10. Then feed it again four months later, in midsummer.
Are Epsom salts good for hydrangeas?
The short answer is yes it will – Epsom Salts is Magnesium sulfate and Sulfur is the mineral that we apply to the soil to lower the pH. This is also the reason that one will find most container grown hydrangeas in a soil-less mix with pink flowers unless they have been given fertilizers containing Aluminum sulfate.
Are coffee grounds good for hydrangeas?
Some gardeners report success in turning their hydrangeas blue by applying coffee grounds to the soil. The coffee grounds make the soil more acidic, allowing the hydrangea to more easily absorb aluminum.
What happens if you don’t prune hydrangeas?
Hydrangeas that bloom on old wood do not need pruning and are better off for it. If you leave them alone, they’ll bloom more profusely the next season. Just remember new growth may come, but that new growth will be without blooms next season.
Should you deadhead oakleaf hydrangea?
Oakleaf hydrangeas bloom best where summers are hot but prefer some afternoon shade. “Deadhead” old blossoms anytime by simply snipping them off. I like to leave the flowers on the plant to enjoy into the winter months. If you are cutting the blossoms for flower arrangements you can cut longer stems before August.
Should I cut back my oakleaf hydrangea?
Oakleaf hydrangeas bloom on the previous season’s growth, so prune right after flowering in the fall or in early winter. Prune the older growth from oakleaf hydrangeas after the shrub flowers. Oakleaf hydrangeas benefit from a light trim, but they do not need extensive pruning to keep their shape.