For questions about how to maintain or assess a plant's health.

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5
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2answers
329 views

What is this disease on the growing tips of my peppers, and how can I control it?

Please have a look at these images of my hot pepper plant. Notice the growing tips which seem withered and diseased. What disease is this and what is causing this? What are the solutions to counter ...
1
vote
1answer
111 views

Why are lots of bubbles coming out of a freshly cut lotus stem?

I cut some old lotus leafs, and there was one stem from which many bubbles got out. I started to worry when I realized that it had been minutes and minutes (I would say at least 10) since the bubbles ...
3
votes
1answer
46 views

Trouble with old ornamental orange tree

My 40-year-old orange tree, originally bought by my mother's friend at the local grocery store as a tiny house plant, has been looking very sad for a while. the main problem is that the leaves are ...
1
vote
1answer
68 views

Why is the lower leaf wilted on all of these plants? Should I remove them?

These basil plants have been thriving steadily better and better since being transplanted as sprouts. However every one of this group of 8 in the end of a planter is exhibiting a wilted leaf, and ...
1
vote
1answer
302 views

Dwarf Alberta Spruce Winter Burn [duplicate]

I have a Dwarf Alberta Spruce which is showing signs of worse-than-normal winter burn. Not only have the needles on the south side of the tree browned, but the new buds on that side also appear to ...
1
vote
3answers
182 views

Are these cobwebs harmful?

I have a new succulent that I'm taking care of, but over the past couple of weeks it has been picking up some fluff that looks a bit like mould but that I believe is cobwebs of tiny spiders. I've read ...
3
votes
2answers
111 views

Dealing with mealy bug infestation on jades

I have a couple of jade and dwarf jades on my windowsill, and I think they've been infested with mealy bugs - I had an infestation about a year ago, on a different plant, and I think it spread to the ...
3
votes
1answer
78 views

Lucky Bamboo stem sags but seems healthy, how do I fix this?

I've had this Lucky Bamboo plant for almost 4 years. It has got two shoots coming out of the main stem, the longer of which is now unable to support itself. We had a very dry winter and I had a hard ...
5
votes
1answer
768 views

Is this mint fungus, or over/under watering my plant?

I have two mint plants that have grown without much fanfare. Occasionally I do notice the odd leaf with very dark brown edges, almost black. Some leaves also appear to have a powdery white substance ...
5
votes
1answer
226 views

What could cause my coriander plant to start browning?

I grew coriander from seeds and the plant has done marvellously well until the last week or two where it appears to have stagnated a little. I noticed that some leaves have began to brown entirely, ...
6
votes
3answers
17k views

Why has our lucky bamboo turned yellow?

Our lucky bamboo has turned yellow in a very short time, after we've had it for almost 2 years. We've trimmed all yellow leaves, and changed the pebble to clean the green algae - what else can be ...
3
votes
1answer
73 views

Brown turkey fig dormancy time

We picked up a brown turkey fig tree last summer. We plan in keeping it in a large pot rather then in the ground. We have a small space and understand they have a good sized root system. Plus we live ...
5
votes
1answer
424 views

Do porch lights affect how grass grows?

If I leave a light on at night, does this help or hurt the grass? No particular kind of grass, just grass. I'm using CFL light bulbs.
3
votes
1answer
1k views

Why is my bonsai losing brown/yellow leaves and developing white dots

I was recently given this beautiful bonsai and I water until the soil is moist nearly every day. But recently it has started dropping leaves and these little white dots are appearing. Why is this ...
2
votes
1answer
89 views

The benefits of coir for pot plants?

I recently bought coir for my pot plants, after I saw many other pot plants (in the garden centre) containing a handful. I would like to know the benefits for pot plants if you add coir above the ...
6
votes
1answer
734 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 ...
3
votes
1answer
461 views

Cucumber plants are healthy, but wilt badly in hot sun, then recover

If cucumber plants are growing well, wilt very badly in the sun, revive quickly in shade and over night, is the wilting harming them? Their soil tests okay for water. I am in northern California and ...
6
votes
1answer
119 views

Hard potatoes harvested

First time grower in Michigan, partial shade and probably not the best soil. The red potatoes I got out first were very hard. Why? What can I do to prevent this with the rest of them before they ...
3
votes
2answers
496 views

What is acid soil?

Everyone talks about acid soil, but what does it mean when someone says my soil is acid? How does soil get that way? Is it a good thing? Is it a bad thing?
1
vote
1answer
911 views

Does soap mixed with water kill plants?? [duplicate]

I'm doing a science fair project for 8th grade and I'm trying to decide my hypothesis but I'm oblivious .
6
votes
3answers
10k views

Does Arugula/rocket flowering mean the plant's crop season is over?

I sowed arugula/rocket in an outside pot 2 months ago. As it was my first sowing of rocket, it turned out to be too dense so I have thinned it out. It was growing nicely, but all of a sudden it ...
4
votes
1answer
53 views

Yellowing leaves on some hibiscus plants

We moved into a new house in SW FL (the Cape Coral area) a couple of months ago, and the front was landscaped with 5 hibiscus plants. All of them are flowering nicely (a nice, fuchsia color), but 2 of ...
5
votes
2answers
306 views

Do I need to leave space at the base of a plant so that air can get into the soil?

I have heard this mentioned many times that at the base of a tree or plant you need to leave the surface uncovered so that air can get into the soil. How true is this? The idea is that if you are ...
2
votes
1answer
87 views

Does it look like a vine borer caused this damage to my zucchini?

After reading the accepted answer on the question "Is something wrong with my zucchini plant?", I've come to the conclusion that it is in fact a vine borer which has invaded my zucchini. Based on the ...
2
votes
2answers
2k views

Schefflera arboricola , seems to be withering and dying, help!

I am not sure what is wrong, the plant seems to be rotting and withering from the top down. The tag says that it is a bush but it has grown to 5 feet or more in height. I tried trimming back the ...
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vote
3answers
141 views

Tomato stems mysteriously cut above the fruit

I have good healthy plants with no signs of (obvious) trouble. Fruits are forming, but some fruits on some plants, and there quite a few of them, are mysteriously cut. I don't see similar damage ...
5
votes
1answer
163 views

What is this plant? What is the white stuff on it?

I've had this plant for a long time, and for most of that time it was outdoors, in a shared area with other plants and heavy sun. It didn't do well, so I dug it out and put in it's own pot, with a ...
3
votes
1answer
100 views

How to prune my sad rhododendron?

We've got PJM rhododendrons at our new house in Michigan... a couple of them are absolutely flourishing, but two of the smaller bushes right next to them are not having a good time. Some of the ...
3
votes
2answers
4k views

Why is my Norfolk Island pine not doing well?

My Norfolk Island pine is not doing so well: the needles are turning brown and the branches are drooping. See photos below. Why did this happen to my plant, and how can I cure it? Click photo for ...
5
votes
1answer
221 views

Small tomato plants have purplish stems

I have Parks Whopper Cr Improved Vf1f2nt Hybrid started from seed indoors. The plants have healthy leaves and seem to be growing well, but their stems are rather purple. Is this normal, or the ...
10
votes
1answer
568 views

What causes spruce branches to drop their needles?

I have a spruce tree that has a problem. Every year, some branches suddenly drop all of their green needles and die. I would like to prevent this, but I don't know what the cause is. What causes this ...
1
vote
1answer
74 views

Should I pinch early pear blossoms to encourage stronger tree and better season?

I have a young pear tree that has several varieties of pears grafted on it. It is starting to blossom. Should I pinch these early blossoms? Will the tree divert resources to making more leaves and ...
8
votes
1answer
181 views

Does Rebutia grow better when grafted onto an Echinopsis?

I have tried growing rebutias before, and failed because the plants lacked vigor and grew slowly. Would they do better if I flat-grafted it onto a columnar Echinopsis, to increase vigor? Are there any ...
2
votes
1answer
95 views

Lilium flower withering

I've just recently (2013.03.08) bought a lilium and an orchid plant from a big hardware/gardening chain store. The day after, I watered them early in the morning with room temperature water ...
3
votes
1answer
142 views

Should I cut leafless stem off of plant?

I have a ( Indoor ) plant that has been drooping lately and its stems are long and touch the floor. I'm not sure if the stems are supposed to be stiff, or if that is just the way the plant is supposed ...
6
votes
1answer
120 views

Potted sweet peas have shot up quicker then expected

Please help i've never grown sweetpeas and wasn't sure what to expect when I chucked the seeds that had started to grow in the packet in with the ones i'd started already and now they have all grown ...
1
vote
1answer
161 views

Sequoia Browning

I have a small sequoia tree which I got from the San Francisco airport as a seedling. I planted it in January 2012 and it has been growing (slowly) and seemed healthy - it is about a foot tall and is ...
2
votes
1answer
1k views

Why the leaf tips of my spathiphyllum look burned?

I have a spathiphyllum and I water it 3 times a week. But the leaf tips look like burned. Is that natural or should I do something for it? BTW, how can I make it blossom?
4
votes
1answer
75 views

I just planted a Paperwhite bulb and I broke the roots. Will it still grow?

I planted it, indoors, about 2 days ago. I rotated it because I thought it was leaning. Then I heard a snap and realized i'd broken the roots. I didn't think roots would have already sprouted :(. Did ...
8
votes
2answers
211 views

What could be the cause of death for my carnivorous plants?

In the past year I've had a venus flytrap and two sundews that each arrived healthy, flourished (and ate!) for a month or two, and then died (after which I tried again and bought a new one!). They all ...
1
vote
1answer
563 views

How to care for/water Snake's Plant (Mother-In-Law Tongue Plant) indoor potted plant?

I have several indoor potted Snake's plants. One pot has several kinds of plants in it, and is reasonably large - probably 16" diameter. It is filled with Prayer plants, another plant (the name leaves ...
6
votes
3answers
3k views

How do I stop dog urine from killing grass?

Everywhere I've lived, the dog urine just kills the grass. I've found nothing on the internet and the garden person at the local hardware said it's impossible. Any suggestions?
3
votes
1answer
410 views

What are these yellow bugs and should I be worried?

I took a close look at one of my plants, and saw all these tiny yellow bugs. They don't seem to be hurting the plant, but I thought I'd ask to make sure. If it helps, this is in the San Francisco ...
4
votes
2answers
2k views

Restoring overwatered rosemary

I have several rosemary bushes in the backyard; I live in San Francisco and rosemary thrives here. However, the landlord overwatered one of the bushes for several months. It's now got some kind of ...
4
votes
1answer
39 views

How should I care for the rhizome of a small canna seedling?

I had been hybridizing cannas in the summer and have a promising young plant. Should I store its rhizome in a basket in the basement like the big rhizomes or do mini plants need special care? The ...
2
votes
2answers
3k views

White spots on rose leaves

I have a rose. I have noticed that some of the leaves have got white dots and do not look healthy. There are also strings between some of them (similar to spider webs). I also noticed some small flies ...
2
votes
1answer
1k views

How should I treat Frangipani rust?

My frangipani experiences rust. How should I best treat/protect my plant from rust (all year round)? My plant experienced severe rust during December/January (Australian Summer). It was a very wet ...
7
votes
2answers
789 views

Cut lupines to the ground, will they grow back next year?

Our lupines (also called lupin in the UK) were done flowering for the year and were harboring an aphid infestation... so I mowed them. Are the "stumps" likely to regrow next year or do the plants rely ...
5
votes
1answer
735 views

What's causing these yellow veins on my Okra leaves?

My Okra leaves have turned as shown below Is this a deficiency or a disease? How can I remedy this? Location: India. Weather In May-June: Hot! > 95F days. Current: Overcast with light rains.
7
votes
1answer
1k views

What is causing diseased leaves on my French beans?

My French bean plants have diseased leaves as shown below: What can be causing this? The beans themselves are relatively plentiful. Location: India. Weather In May-June: Hot! > 95F days. The ...