Questions tagged [plant-health]

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

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25
votes
2answers
34k views

Why has my mint plant gone all woody/sparse/stringy?

I grew my mint plant in a pot to contain the roots, and that has worked well for 3-4 months. However, the plant is not really producing fresh leaves now. Is there anything I can do?
21
votes
1answer
30k views

What conditions are necessary to make a potted aloe vera bloom?

I have a potted aloe vera that I keep indoors during the winter and outside the rest of the year. It has leaves one foot long and two inches wide at the base. I fertilize it with tea from my ...
19
votes
4answers
194 views

How healthy are seedlings sent by mail?

I've never bought seedlings out of seed catalogs, but am sometimes tempted to (especially by the flashy free $20, no obligation seed catalogs). I'm just wondering what the considerations are when ...
16
votes
5answers
36k 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 done?...
16
votes
4answers
17k views

How should a lemon tree with yellowing leaves, peeling bark, and small fruit be saved?

Our lovely lemon tree is in trouble... We live in Northern California. Starting mid-last summer our tree began yellowing. We've called an arborist out to the house but the advice has been pretty ...
15
votes
8answers
35k views

Why do my newly planted arborvitae keep dying?

I planted arborvitae a year ago that died (five total). I replanted all of them (new trees) this year and three of them are now dying again. Soil Conditions The dirt up here is practically just ...
15
votes
7answers
10k 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 ...
15
votes
7answers
4k views

How long do amaryllis bulbs live?

I've had an amaryllis bulb in a pot for about 5 years now and the bulb hasn't been doing much for, I reckon, over 6 months. When should I consider getting rid of it? Could it have run its course?
15
votes
2answers
49k views

Can this peace lily be saved?

We have bought this peace lily plant one or 2 months ago, but suddenly all life seems to have gone out of it. Can we still save it? We watered it once a week, so I don't think that is the issue.
14
votes
2answers
4k views

Why are there kinks in my aloe vera leaves?

On several of my aloe vera plants, the leaves suddenly became kinked. The leaf would get very thin in a spot and bend over. It starts near the tip and is most noticeable on older leaves. What is ...
14
votes
1answer
4k views

How do you save an aloe plant whose stem is weak and appears to be rotting?

I have a large aloe plant that is probably 5 years old and has bloomed twice. Stem is very tall and leaves are approximately 2½ to 3ft (750 to 900mm) long and still very green except at the stem ...
14
votes
1answer
2k views

How to help a Jade plant heal?

I have a couple of Jade plants ( Crassula ovata ) that I have grown from leaf pieces over the course of the last 10 years or so. This year, for the first time, they appear to have been attacked by ...
13
votes
2answers
19k views

My basil had a shock after transplanting. What did I do wrong?

First a little backstory: I bought the basil at a supermarket, where it came in a small plastic vase. I kept it in this vase for three weeks. During these three weeks, I did the following: kept it at ...
13
votes
2answers
2k views

Will my lupines grow back next year if I cut them to the ground?

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 ...
13
votes
1answer
1k 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 ...
12
votes
4answers
48k views

Should I use aluminum sulfate (sulphate) to acidify my soil?

It is often recommended online or by nurseries to apply aluminum sulfate to plants like blueberries, rhododendrons, azaleas and to hydrangeas to make the flowers blue. Is this advice I should follow?
12
votes
2answers
264 views

Chuck the plant - am I ill?

My name's Chuck, and I'm a plant. Bamboo tells me I'm a Sansevieria trifasciata laurentii, also known as "Mother in Law's Tongue" or "Snake Plant" (see other question here). I live indoor with my ...
12
votes
2answers
5k views

Tillandsia (air plants) Turning Black and Dying After Watering

I live in a northeast Connecticut boarding school, and have ten tillandsias on the windowsill of my dormitory room. I cannot collect rain water for them because I have no tools to do so, so the water ...
12
votes
1answer
15k 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 ...
12
votes
1answer
9k views

Are the yellow leaves on my Massangeana due to root rot?

I bought my Massangeana (Dracaena fragens) 15 months ago, and he's be doing really well. Started off with a few burnt ends, but I switched to filtered water and he was good again. In the last couple ...
11
votes
3answers
2k views

Cherry sapling has orange dots on its leaves and the tips are wilting. What could be wrong?

I recently planted a cherry tree sapling about two weeks ago. It's about a handspan high, and has four leaves. I noticed that it had orange spots on one of the leaves when I planted it. Click on the ...
11
votes
2answers
2k views

What are the disadvantages of having creepers or normal plants indoors?

I never had indoor plants before. Are there disadvantages to having indoor plants in a dusty environment? If the plant is a creeper, is there a way that I can clean its leaves? Probably by spraying ...
11
votes
2answers
10k views

Will leaving fallen leaves on the lawn during winter damage the grass?

I have a lot of leaves on my lawn (in Oklahoma). Will it hurt the grass if I leave the leaves there over the winter?
11
votes
2answers
4k views

What should I do after a pepper plant has partly broken under its own weight?

So, I'm sitting here on my computer and get the life scared out of me by a horrible cracking, rustling, thudding sound. I turn to find one of my peppers plants has broken - apparently one of the upper ...
11
votes
2answers
3k views

How does pH affect plant growth?

I am aware that different plants thrive/need different pH levels to grow. What is it about the alkalinity/acidity of the soil that effects how a plant grows? Note: I understand that this could have ...
11
votes
1answer
2k 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 ...
11
votes
1answer
5k views

Why does my pepper plant have yellowing, drying and curling leaves?

One of my pepper plants has so far suffered from pests, blossom end rot and odd skin blemishes and unfortunately the plant is now taking a turn for the worse and looking rather unhealthy. The leaves ...
11
votes
1answer
2k views

Why did the stem suddenly weaken in my oriental poppy?

I have an oriental poppy 'Patty's Plum' growing in new potting compost in a pot with good drainage. It sits in full sun, and I water it as needed in the recent dry weather. I purchased it from a ...
10
votes
2answers
301 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 ...
10
votes
1answer
9k views

Can an aloe plant that's completely rotten at the base be cured?

I had a potted aloe plant that looked like a set of leaves coming out of a single spot at ground level. One day it just fell apart - the leaves and the roots got completely rotten at ground level and ...
10
votes
1answer
6k views

Venus flytrap/Dionaea muscipula doesn't grow traps anymore

I've had this Venus Flytrap since about 6 months. It was in bloom when I got it (for some reason shops like to sell flowering plants). I read that flowers take a lot of energy from the plant, and ...
10
votes
1answer
834 views

Can I cover an evergreen shrub in winter?

I have a small evergreen shrub that gets frost burn in winter. I had been told to use tar paper on it over winter, but I was concerned that since it is a broad-leaved evergreen it might need light in ...
10
votes
2answers
4k views

How do I treat rhubarb rust?

I have a small rhubarb plant and one of the stems has gotten some rust on it. What should I do? (there are only 3 small stems on the plant)
10
votes
1answer
606 views

What's wrong with planting a tree deeper than the root flare, or mulching higher?

People tell you that when you plant a tree, you should plant the root flare level with the soil line. And when mulching, that you shouldn't pile the mulch up over the root flare. What harm can be ...
10
votes
1answer
1k 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 ...
9
votes
1answer
1k views

When should I transfer from pod to pot or ground?

Since the pre-sprouted plant season is in full bloom, what is a good indicator of the time to transfer a pre-sprouted plant? For instance I have a mexi-bell pepper in a plastic pod and two basil ...
9
votes
2answers
8k views

How often should I water an Amaryllis plant?

I have a red amaryllis plant that is currently looking like it's doing well. It hasn't yet flowered and it is in a fairly early stage of growth. The plant care instructions said that it's important to ...
9
votes
2answers
2k views

A few leaves on my peppers are showing multiple small holes, should I be worried?

I've noticed that a small number of the leaves on my pepper plants are showing several tiny holes through their surface. These are focused towards the stem of the leaf, and not so much towards the ...
9
votes
2answers
101 views

Is it possible to get a plant that is just a genetic dud?

Is it possible that an instance of a plant could just be a dud. As in even with great care it is never healthy?
9
votes
2answers
2k views

Why are my basil seedlings failing to thrive?

I have grown basil from seeds in a large pot. They have germinated but are now failing to thrive. They are now about 3 weeks old. They get the afternoon sun and are watered daily. I applied Seasol ...
9
votes
1answer
2k 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 bottom ...
9
votes
1answer
6k views

Should you trim off half yellowed leaves on an indoor plant?

My mum has a plant (Aglaonema modestum) which she doesn't quite take care of, and it is messy with dead leaves and half yellow, half green leaves. I find them very ugly and want to trim them off. The ...
9
votes
2answers
16k views

Why are the leaves on my mango tree turning brown and drying out?

I grew a mango tree last summer from seed in a pot. In the beginning it was extremely healthy looking and fast-growing. When the summer was over, as it gets very cold here in Canada, I took it indoors ...
9
votes
1answer
262 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 ...
8
votes
3answers
30k 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 ...
8
votes
3answers
709 views

Do pine beetles kill healthy pitch pines, or is it safe to plant seedlings to replace trees killed by them?

We need to remove a number of trees that have been killed by some kind of pine beetle - presumably black turpentine beetle - on eastern Long Island. These trees had suffered injury from salt spray ...
8
votes
2answers
3k views

Should I seal the wounds where limbs were removed on a crape myrtle?

I have a crape myrtle that I attempted to transplant last spring. Unfortunately, it didn't do so well (I damaged more of the roots than I intended), and while it did leaf out last year, after a long ...
8
votes
2answers
4k views

Is it good or bad to have mushrooms growing in the soil of my fruit tree?

As you can see I have mushrooms in my soil. Are they bad? Are they going to cause root rot in my plants? Also, are the mushrooms infectious through the air? It's my testing soil. I plant different ...
8
votes
4answers
2k views

How can I restore foliage in a Chinese Elm bonsai?

My Chinese Elm bonsai lost its foliage from the time of purchase (June) until now (November): Roots seem fine (i.e. not rotten): Is there something I can do (e.g. re-potting, pruning, feeding, ...
8
votes
2answers
4k views

What is causing the leaves to develop brownish patches between the veins on my tomato plant?

My tomato plant's leaves are turning brown in some places (photo). Zoom in It seems to affect mostly older leaves, but not all of them, as you can see in the image. It starts with a few small brown ...