Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [hydrangea]

Genus of flowering plants, also known as Hortensia.

1
vote
1answer
28 views

Identifying a plant with pink and white flowers which grow in clusters

I was wondering if anyone could help me identify the plant with the pink flowers in the photo below. This photo was taken roughly a week ago in western Shanghai, China, at a public park. Many thanks ...
2
votes
1answer
34 views

Hydrangea leaves going brown

We just recently bought and installed a hydrangea about a month ago. We planted it and added organic fertilizer and have been watering it daily. It gets morning and mid day sun and shade in the ...
3
votes
1answer
234 views

Dying Hydrangea

I have had this hydrangea for a couple of weeks. When I first got it, it had beautiful, big blue blooms. But, now it seems to be dying. I'm keeping it in a place where it is shaded for most of the day,...
4
votes
2answers
134 views

Hydrangea's allelopathic effects on crops?

I was wondering if hydrangea had any effects on the growth of other plants. Doing a google search only told me that hydrangeas are immune to juglone. However I'm more interested in the effects of ...
6
votes
1answer
43 views

Why does my Mathilda hydrangea have an old green flower and a new purple one on the same stem?

Hydrangeas are my favorite flowers. I only have one potted Mathilda gutges plant in my condo. I don't know much about their care. The plant had three flowers. It was dying and I cut two of them ...
4
votes
3answers
1k views

Hydrangea flowers not blooming as expected

On one of the hydrangea plants the flower is blooming as expected whereas with the other plant only some of the buds are blooming or not blooming at the same time to give it a nice pretty look. I have ...
3
votes
1answer
60 views

Should I cut Hydrangea surfacing roots?

My hydrangeas have sprouted roots above ground. The shrubs are three years in. Can these roots be cut off without loosing the plant?
5
votes
2answers
218 views

Cuttings growing leaves underground

I took a cutting from my hydrangea. I left two sets of leaves and plucked off the rest. I then stuck the plant into a blend of soil and perlite with two nodes under the soil. It has sprouted a few new ...
3
votes
1answer
219 views

How and when should hydrangea be trimmed?

The picture above shows the current condition of Hydrangea plants in need of pruning. How and when should they be trimmed?
2
votes
1answer
66 views

Will Hydrangeas Next to a Freshwater Seawall Suffer from Occasional Flooding?

I am considering planting some hydrangeas next to the seawall at a freshwater lake. Normally the water level is about 14" below the top of the soil but about twice a month the water level will rise to ...
0
votes
1answer
222 views

Long time blooming hydrangea

I have a small garden , and i have planted a hydrangea in a large pot.But it gave me flowers for a very small time of the year. When i checked in net some one was saying "forever and ever hydrangea" ...
2
votes
1answer
153 views

can I cut back hydrangea flowers? [duplicate]

we had an unusually dry season and my hydrangea blooms looks burnt I have noticed new growth is it ok to dead head the old flowers
4
votes
2answers
407 views

Hydrangea has turned brown

I planted my bush this summer. It was in bloom when I bought it. Now all the blooms have turned brown. It's been extremely hot here in eastern Kentucky. Should I go ahead and cut off the dead blooms?
4
votes
1answer
431 views

hortensia and brown leaves

I have an hortensia which is getting more and more brown leaves (see pictures) Ground seems OK (not dry). Any idea on a possible cause? Edit I am using tap water as I did for years, the same I use ...
5
votes
1answer
96 views

How do I treat a Hydrangea?

We have three hydrangea bushes. We didn't trim the dead sticks on them because of so many stories being told to us saying yes, trim them back because it will help them bloom more; and no because the ...
7
votes
2answers
71 views

Can flowers change colour after forming?

I'm actually studying for a chemistry exam, and in the Wikipedia page for Hydrangeas, it states that In these species the color (flower) is affected by soil pH. So the plant evidently takes the ...
1
vote
2answers
135 views

How do I dry Hydrangeas to preserve as much color as possible?

I have blue to purple hydrangeas and would like to dry them. I have tried hanging them upside down, standing in a vase, cutting and rinsing the stems then drying in a vase. Nothing seems to leave as ...
8
votes
5answers
289 views

Why isn't my hydrangea producing flowers?

My hydrangea is very leafy, but not producing flowers. Should I be adding something to the soil? This is the second consecutive year and I am totally perplexed. Appreciate any and all assistance. ...
3
votes
1answer
325 views

Is the moisture sensor reading correct in my self-watering vase?

I have an hydrangea in a «self watering» vase (a Lechuza Cube) and I use a Parrot Flower Power to monitor soil moisture. The soil moisture level sensor stays constant (17%-18%), watering the vase ...
3
votes
1answer
485 views

Why are my hydrangea flowers dying, but the leaves look OK?

I bought some Hydrangeas in pots in full flower. They were then left un-watered. They are now suffering from dead flowers but the leaves look OK. It is now August in North Yorkshire. Any ideas what I ...
6
votes
3answers
2k views

How should I deadhead a Hydrangea?

How do I remove the dead flowers on my Hydrangea? Do I just cut them off at the bottom of the dead flower bloom? Please advise what and how I should handle the hydrangea flowers after they turn brown.
2
votes
1answer
325 views

Why did hydrangea flowers change from pink to light yellowish/brownish green?

We have a hydrangea in its second season planted outside (New York region). The plant gets a lot of sun for most of the day. The plant had pink flowers the first season and the beginning of this ...
3
votes
1answer
885 views

Dealing with Hydrangea with dark green flower tips and wilting leaves

I had a pot of hydrangeas for a few months which I keep outside. I water them twice a day: in the morning and in the early/late evening. They receive little to no direct sunlight - which according to ...
7
votes
1answer
2k views

What Should I look (out) for when purchasing a hydrangea plant?

I was about to buy a potted hydrangea as a last minute gift. I looked at the stem and it appeared dry, brittle and brown at the base of the plant. It's nice and green and firm near the heads of the ...
8
votes
1answer
894 views

How do I prune my mop-head hydrangea?

I have a five year old Annabelle Hydrangea that is getting bushy. I have lightly pruned it in the past, but I don't know really know how I am supposed to do it. It is about 4' high and 6' wide. How do ...
12
votes
2answers
5k views

How do I change the color of my hydrangea flowers?

So, I've heard that people sometimes mix a bit of lemon juice in when they water blue hydrangeas, they say it keeps them blue if the soil is lacking in acid. I was wondering, I have a pink indoor ...
19
votes
2answers
104k views

Should I remove the dead flower heads from my hydrangea?

Earlier this year, I bought a hydrangea (from Ikea of all places!) and planted it out in the garden. It flowered nicely for a while, but the flowers have pretty much finished now and nearly all of the ...