We use the word “influence” since using lime or acids rather than compost is more common when adjusting soil pH to change the color of bigleaf hydrangeas. Composting your planting bed has kinder and healthier impacts than using powerful additives to make abrupt pH alterations.
Additionally, hydrangeas adore the rich, wet soil that compost produces. You have probably observed that hydrangeas require a lot of water each week. Your hard clay soil’s ability to hold moisture is improved by soil3.
Bigleaf hydrangeas come in both blue and pink varieties, and most gardeners are content with whatever color the soil pH produces. The health of your hydrangeas is the primary priority. By incorporating compost, you may enrich and care for the soil that supports your favorite hydrangea shrubs, allowing it to support the healthiest hydrangeas you’ve ever grown.
Read the Soil3 Story: Creating Hydrangea Heaven with Soil3 Compost to see how Drte Schmieta uses Soil3 in her hydrangea garden.
A client who lives close to our Orangeburg, South Carolina, farm emailed these photos of his prized hydrangea flowers, which he planted in a garden bed with Soil3. Because Soil3 neutralized the soil, you can see how some of them have taken on a reddish hue. He has every right to be proud of his Hydrangea macrophylla (also known as bigleaf hydrangeas), and we appreciate him sharing that pride in both our compost and his plants.
Which compost kind is ideal for hydrangeas?
An inadequate diet may make a Hydrangea’s style difficult. However, if you’re the type of gardener that favors natural techniques, you might be thinking whether all of those specialty fertilizers you see online are actually necessary. Can you use compost or other natural fertilizers to grow hydrangeas?
Yes, it is the answer. Compost, whether purchased or prepared at home, will help hydrangeas grow and thrive since it is nutrient-rich and improves soil drainage. Most Hydrangeas respond well to all-purpose compost, but ericaceous compost is preferable if you want your Mopheads or Lacecaps to produce blue flowers.
The fact that you can make compost in your own backyard is arguably its best feature. Simply gather the ideal mixture of kitchen and grass scraps and spread them out for your neighborhood worms and microorganisms. Your hydrangeas will receive a ton of nutritious yield from them.
Does compost or mulch work well for hydrangeas?
Mulch excels as a superhero in the backyard garden. Even on the hottest days, it maintains soil moisture, prevents many troublesome weeds from growing close to plants, controls soil temperature, and even aids in preventing erosion. A heavy layer of mulch provides hydrangeas with the same protection that other garden plants do. Your hydrangeas will appreciate the mulch by growing better and producing nicer blooms if it is spread and maintained properly.
Choose a mulching substance. An organic mulch that decomposes and enriches the soil is beneficial for hydrangeas. Examples of organic mulches ideal for hydrangeas include compost, pine straw, and pine bark. Chopped leaves are another option.
Depending on the size of the material, apply the mulch 3 to 5 inches deep. Since a thicker layer could prevent enough air and water from reaching the soil, finer mulches with bits 1/2 inch or smaller should only be put to the soil to a depth of 3 inches. Medium mulch should be 4 inches deep and include particles no larger than 1 inches. For coarser mulches, apply 5 inches.
To completely cover the space underneath the canopy, spread the mulch around the shrubs. Leave 2 inches of space between the mulch and the hydrangea’s stem to reduce the chance of crown rot.
What kind of compost is ideal for hydrangeas grown in pots?
Generally speaking, a potting mix with a loam foundation is preferable. In mixtures with a variety of varying pH levels, hydrangeas can flourish. But keep in mind that you must select an ericaceous compost and sustain acidity over time if you are producing a blue variety.
What kind of soil is ideal for hydrangea planting?
In dappled shade that is neither very sunny nor overly dark, wet, well-drained soil is excellent for hydrangeas. Avoid sites that face south, especially if the soil is quite dry. Grow Hydrangea anomalasubsp. petiolaris, a climbing shrub, in an extremely shady area like a north-facing wall. Avoid planting in a frost pocket and plant away from strong winds in the spring since the tender new growth is vulnerable to frost damage.
Most soil types, including alkaline and acidic soil, are suitable for hydrangea growth. The color of some types’ flowers will vary depending on the pH of the soil. If the soil is acidic, some plants that typically produce pink flowers will instead produce blue ones.
When to plant hydrangeas
Hydrangeas grow best in the spring or fall when the soil is warm and moist. It is possible to plant in the summer, but you must monitor the soil’s moisture content.
How to plant hydrangeas
If your soil is thin, bulk it up with moisture-retaining organic matter before planting hydrangeas because they thrive in damp soil. A good hour or so before planting, thoroughly water the plant. A hydrangea should never be planted any deeper than it was in the pot. Well with water. After planting, add a layer of mulch. Leaf mould is preferable, but compost or well-rotted manure can also work. Throughout the plant’s first spring and summer, make sure it gets plenty of water.
Train climbing hydrangeas initially onto galvanized wires before planting. They have roots that attach to themselves, so after a season of growth, they will find their own way.
Watch this Gardeners’ World video to learn how to plant lacecap hydrangeas:
What should I feed hydrangeas to encourage blooming?
When purchasing fertilizer, check the labels to see how much nitrogen (N), phosphate (P), and potassium are present (K). A general-purpose, balanced fertilizer such a 10-10-10 N-P-K or 12-4-8 N-P-K is typically best for hydrangeas. Consider using a fertilizer with additional phosphorus if you want your hydrangea blossoms to be bigger and more numerous.
Since phosphorus is the middle element, fertilizer with the formula 10-20-10 will do. Choose a slow-release granular fertilizer with the designation “bloom boost” if you’re looking into it because it might also include more phosphorus.
How can the soil around my hydrangea be improved?
You can amend the soil with old manure or organic compost to provide rich, well-drained soil for your hydrangeas. Beneficial soil microbes are fed by organic matter, which improves and helps aerate the soil. Hydrangea roots have space to expand and can avoid root rot in well-drained soil. Before planting, cover the soil with 2 to 3 inches of organic matter in the spring and work it into the ground to a shovel’s depth. A 2-inch layer of mulch placed over the planting bed in the winter will increase the organic matter available to microorganisms, minimize soil erosion, and compact the soil.
How frequently should hydrangeas be watered?
Although the hydrangea’s leaves and flowers seem delicate, little careful care is actually needed for them. Everything you need to know about caring for hydrangeas is provided in these recommendations.
- Over the course of the growing season, water at a rate of 1 inch per week. To promote root growth, deeply water three times each week. All varieties of hydrangeas benefit from constant moisture, but bigleaf and smooth hydrangeas need more water. To water thoroughly while keeping moisture off the flowers and leaves, use a soaker hose. Hydrangeas won’t wilt as much if they are watered early in the day on hot days.
- To keep the soil around your hydrangeas cool and moist, add mulch. Over time, an organic mulch decomposes, supplying nutrients and enhancing soil texture.
- Apply fertilizer according to the type of hydrangeas you have. Every variety has varied requirements and will profit from applying fertilizer at various times. A soil test is the most effective tool for determining your fertility requirements.
- In March, May, and June, bigleaf hydrangeas require numerous mild fertilizer applications.
- Two applications in April and June work best for oakleaf and panicle hydrangeas.
- The only time smooth hydrangea plants require fertilizing is in the late winter.
- By selecting cultivars with resistant characteristics, you can avoid pests and diseases. Hydrangeas can have leaf spots, bight, wilt, and powdery mildew. Although they are uncommon on hydrangeas, pests might arise when the plants are under stress. Aphids, leaf tiers, and red spider mites are examples of potential pests. Your best line of defense is to properly care for hydrangeas.
Are hydrangeas suited for composted manure?
The answer is that it depends on a variety of variables. Which zone do you call home? Is the wood of your hydrangea old or new? Which kind is it? If you remove the previous bloom, you can also remove the blossom for the following year.
The stems and branches from the plant’s previous year are what are known as “old wood” on hydrangeas. It won’t be green; it will be brown. The term “new wood” describes recent growth.
In the fall, trimming is a task that is best completed. Don’t trim the hydrangea at all if it blooms on old wood.
The answer varies depending on the type of hydrangea you have. Every year, the spotlight we had was diminished. Pruning other varieties would prevent them from blooming because they only produce flowers on aged wood.
The best option is to use composted cow dung. It can be composted, and the hydrangeas will benefit from it.
I want my hydrangea to flourish and I live in Puerto Rico. Should it happen indoors or outdoors?
You’ll have to grow it inside. The heat in Puerto Rico makes it impossible for your hydrangeas to grow.
The soil shouldn’t be allowed to dry out completely. When it starts to grow dry, water it right away, but don’t overdo it. That is worse than not enough irrigation.
Can my potted hydrangea be transferred in the spring if it was affected by frost while being encased on my patio and the leaves have already begun to fall?
The answer is that you can move your potted hydrangea. It should thrive as long as it is hardy for your zone.
Use a container that is large enough to fit the hydrangea first, is the response. It’s recommended to be at least 18″ tall. The greatest choice would be a dwarf plant. They will continue to be modest. There are many different accessible kinds. You should grow your hydrangea outside if you want it to grow as tall as an Annabelle because doing so will prevent it from becoming root-bound in a pot. It will eventually crumble. However, if you pick the appropriate variety, you can have a lovely plant in a container. I advise growing hydrangeas outdoors in soil if you want a tall variety.
Why are the hydrangeas in my pots dying?
A hydrangea’s roots can be burned if too much fertilizer is used, which will likely result in the plant dying, turning brown, and drooping.
As such, hydrangeas are not heavy feeders and do not require annual feeding in the same manner as roses do, and doing so can actually be detrimental.
Hydrangeas frequently develop and flower to their full potential if they are planted in healthy soil or the soil has been modified with compost prior to planting.
The hydrangea should flourish if a 1-inch-thick layer of mulch is applied around it to assist retain moisture and supply nutrients to the soil (compost and leaf mould are ideal options).
Only in the following circumstances should fertilizer be used:
- Planting the hydrangea in sandy soil (which is nutrient poor).
- The hydrangea is in a pot or other container where the roots have used up all the nutrients in the soil.
In these two situations, it is recommended to use an all-purpose fertilizer with equal parts nitrogen, phosphorus, and potassium (NPK) that is applied once in the spring and is generally well-balanced.
The roots of your hydrangea can be burned by well-rotted manure, especially if it is added to the soil after planting. However, if the manure is made from poultry manure, it may contain a lot of nitrogen.
To prevent issues, I advise putting compost to the soil as a soil amendment (fresh manure is particularly harmful, always allow it to rot for a year or so before using manure on your garden).
If your hydrangea is exhibiting indications of stress as a result of being recently planted in soil that has been altered with manure, move it to a location with soil and compost, and it should recover.
Reduce the amount of fertilizer used and remove any discolored leaves or blossoms. To assist the hydrangea recover, thoroughly water it in an effort to dilute the soil’s water-soluble nitrogen.
Key Takeaways:
- Most frequently, hydrangea deaths are caused by the soil’s lack of moisture. Because they need their soil to be continually moist, hydrangeas will droop or even die in a dry environment.
- Drought, transplant shock, frost damage, and too much sun can all cause hydrangeas to perish.
- If the pot base doesn’t have drainage holes, potted hydrangeas may succumb to root rot. Small containers may dry out too rapidly and limit root expansion.
- Water hydrangeas liberally, cover them with compost mulch, and keep them out of the sun and wind to help them recover. To encourage healthy growth, remove any growth that has been sunburned or damaged by frost.
How are potted hydrangeas maintained?
Remove any foil wrapping from the hydrangea if it was a gift. Remember that hydrangeas offered for sale around the holidays might not be hardy enough to endure indoors. If you’re serious about growing hydrangeas indoors, your chances of success may be higher if you buy them from a nursery or greenhouse.
Place the hydrangea in a sizable pot filled with superior potting soil. Put the plant in an area with lots of light. Hydrangeas planted outside can take some mild shadow, but interior plants require lots of light (but not intense, direct sunlight).
When the plant is blooming, give your potted hydrangea indoor plant periodic waterings, being cautious not to overwater. After blooming, reduce watering but never let the potting soil go completely dry. If at all feasible, use distilled water or rainwater to hydrate potted hydrangea houseplants because tap water frequently contains chlorine and other pollutants.
If the air inside is dry, use a humidifier or put the plant on a humidity tray. Particularly when flowering, hydrangea thrive in a cool environment with temperatures between 50 and 60 degrees F (10 and 16 degrees C). The environment is probably too warm if the leaves start to get brown and crunchy around the edges.
Keep heat sources and drafts away from the plant. While the plant is blooming, feed it once a week with a water-soluble fertilizer that has been diluted to half strength. After that, limit feedings to to one monthly.
It is advised to give hydrangeas a time of hibernation in the fall and winter when growing them as houseplants. Place the plant in a room that isn’t heated and is about 45 degrees Fahrenheit warmer (7 C.). To keep the plant from wilting, the potting mixture should be kept on the dry side but only lightly watered when necessary.