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

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6
votes
1answer
697 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
286 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 ...
12
votes
6answers
4k views

Chlorine vs Chloramine: Both harmful?

I've seen a lot of information saying that chlorine can be bad for some plants and the suggestion to let the water sit out for several hours before using it on plants. I rarely see anything about ...
6
votes
1answer
109 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 ...
2
votes
2answers
474 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
821 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
9k 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
51 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
253 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
78 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 ...
1
vote
3answers
132 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 ...
3
votes
1answer
145 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
96 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
212 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
547 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
178 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
93 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
136 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
138 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
74 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
207 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
549 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
384 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
741 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
704 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
929 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 ...
5
votes
1answer
595 views

Why are my lemons cracking?

My lemons are cracking as shown in below image: What can be causing this and how can I prevent this in the future? Location: India. Weather In May-June: Hot! > 95F days.
9
votes
1answer
2k views

How can I help a sunburned jade tree recover?

I put my jade tree out to get some sun yesterday, and apparently the sun was a little too blazingly direct. Instead of the healthy red edges I was expecting to see, several of the leaves are now ...
4
votes
1answer
162 views

Letting basil loose. Will it die?

I let my basil grow from seed, and I very seldom trimmed it. My aim is to understand the plant life cycle, so I did it on purpose. The plants are so arranged: Three vases sitting in a larger, long ...
3
votes
1answer
162 views

How long until the fireblight is gone?

Our fruiting quince tree has fireblight. We've been trying to control it by pruning, but it's not working. We're going to have to take out the tree. I can't buy quince fruit, so I want a quince ...
2
votes
1answer
262 views

Can I use an NPK compund fertilizer on herbs?

I have some "Low nutrient NPK compound fertilizer" which is sold as Citrus Food left over from a Calamondin tree which has sadly passed away. Can I use this fertilizer on my herbs? They are basil, ...
4
votes
2answers
147 views

What is this little narrow leaved rosette forming plant?

I have a little plant and don't know it's name. I don't know how to maintain it or what kind of soil or fertilizer it needs. Any suggestion is welcomed in advance! Edit1: Can I bring out the root, ...
6
votes
2answers
429 views

What is this fungus or weed growing in my flower bed?

I came home today and noticed two patches of this stuff in my flower bed. I recently put down new mulch and I just started watering my lawn again. I live in Texas. 1) Is this a fungus? 2) Is it ...
3
votes
1answer
84 views

How can I prolong a marigold?

A girl who's graduating just got a pot with a pretty little flower in it from her a capella group as a parting gift. She's about to fly away across the world, so she can't take it with her, so she ...
7
votes
1answer
92 views

Will a winter-damaged hosta self repair?

In winter, the next-years growth spikes of some of my Regal Blue Hostas got trampled off, and now that they're up, the leaves all have blunt-ended, ragged ends that curl and ripple. This is right by ...
3
votes
2answers
911 views

Is it okay to grow English ivy on the base of a tree trunk?

In one place in the yard, there is a carpet of ivy under a black walnut. Would it harm the tree in any way to let the ivy up to the base of the branches? I would like to do this so that the whole ...
3
votes
1answer
94 views

How should budding off be prevented on Gardenias?

How can budding off be stopped on a mature Gardenia? The plant is healthy in all other ways, but the buds always fall off before opening. What is causing this?
8
votes
1answer
1k views

What are the optimal growing conditions for chives?

I have a few questions about starting chives (Allium schoenoprasum) and keeping them happy. I understand chives can survive and grow in many conditions, but what are the best conditions? A few ...
3
votes
1answer
126 views

How should I care for a dozen bulbs of Lycoris squamigera?

Someone gave me a box of bulbs, Lycoris squamigera (Resurrection Lily), and I don't really know how to care for them. They are in a cardboard box in my basement right now. When I looked up how to care ...
8
votes
1answer
616 views

Should my spruce tree roots be covered?

This Norway spruce's roots have always been on top of the ground. The soil it is growing on is very hard white dry soil with a layer of decayed needles on top. It has been growing fine so far, but ...