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Questions tagged [light]

Illumination, required for photosynthesis.

3
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2answers
67 views

How much sunlight is required to grow a coffee plant indoors?

I’m trying to grow some coffee plants inside and I have no good place where they get all their needs so I want to start with a blank slate and control everything myself. I know coffee plants like ...
0
votes
3answers
71 views

Co2 enrichment with exhale bags

I’m intending to try co2 enrichment with Exhale bags. And from reading on the co2 enrichment I understood that photosynthesis does not play a role during night time and the plant actually emits co2. ...
0
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1answer
46 views

How to create an indoor gardening?

I'm looking to build an indoor garden to grow lettuce, basil, maybe tomatoes etc.. I have numerous questions : Are smart gardens a viable options ? (In terms of electricity cost and harvest ...
3
votes
1answer
102 views

San Pedro tipped over and broke

My San Pedro has been growing quite a lot the past 2 years, but very thin. It was windy the other day and found him tipped over. Not completely broke in half, only half way. So I tipped him back right ...
3
votes
1answer
35 views

Heat and light a 6’x7’ room for plants

I have a 6’ x 7’ room (1.8/2.1 m) that I want to heat and light to bring my outdoor potted plants in for winter. How much light do I need? Will a 150 watt r40 flood light do the trick? Hibiscus mainly....
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0answers
98 views

What wattage of LED full spectrum grow light is best for ferns?

What wattage of LED grow light is best for ferns?
4
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2answers
144 views

Advice on LED light periods for cactus

I want to grow large cacti, see my previous question. So I start with small plants and to keep them growing in winter time I want to give them LED (special grow) light. I was wondering about the best ...
0
votes
1answer
46 views

Why do plants need water?

Might seem like a stupid question at first, but let's think about this for a minute. Obviously, the living tissues contain some water, but it seems negligible compared to the quantities that plants ...
4
votes
1answer
28 views

Lighting Suggestions for Weeping Mulberry?

Just did a little trimming and while staring at it thought this area could possibly look nice with some type of lighting beneath the tree. Any suggestions on the type of light and where to place it? ...
5
votes
2answers
60 views

What kind of grow lights do I need for a butternut squash?

I just potted a butternut squash seedling. The way my patio is situated, it doesn't always get a lot of sunlight - and I think butternut squash requires ~6 hours of it. I was going to go ahead and get ...
2
votes
2answers
56 views

How do grow light work?

I ordered grow lights and I never put thought into it until I got bored. But the ones I ordered (found Here) use blue and red LED's for light. What role does the Blue and Red light play for plants? ...
1
vote
1answer
45 views

Do plants react differently to artificial light than to sunlight?

Sun light is 5700Kelvin and up to 100 000 lumens per square meter. If I was to use Halogen or LED light's with similar properties would plants (sunflowers in particular) know the difference?
5
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2answers
544 views

Is this night lamp setup helpful or harmful for seedlings?

If I keep the regular (so called warm white) night lamp during nights above my Echinacea angustifola and Rudbeckia hirta seedlings (like pictured in the photos), would it be helpful or harmful for ...
1
vote
1answer
304 views

PPFD vs general sunlight requirements

Can someone give (or point me to) a rough guide of the correlation between generalized sunlight requirements (i.e. partial sun, indirect sunlight, full sun, etc...) and their approximate corresponding ...
4
votes
1answer
71 views

Help with apartment gardening and lighting mainly concerning bougainvillea

I have recently moved apartments to be closer to school, and sadly where I have moved is a basement apartment without a patio or windows that get a lot of sun. I have a fair collection of plants and I ...
4
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0answers
91 views

Indoor LEDs: Recommended Light Levels for Vegetables, Herbs, etc

I'm growing vegetables and herbs with LED lights inside. Where can I find a list of recommended lighting values (uMol per square foot) for a long list of plants that I might want to grow? For ...
6
votes
2answers
63 views

Do olives need darkness? How much?

I understand (1, 2) that whether and how much time a plant needs to be in the dark depend on the type of plant. What's the answer for the olive? The reason I ask is that my city shines lights up on ...
2
votes
0answers
38 views

Indoor durian started do dry out

I will really appreciate any help. I grow a durian tree in my livingroom and so far it's been doing great. Since september, it started sheding leaves one by one (only one at a time always goes kind of ...
2
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2answers
2k views

Can I put my Aloe vera plant in a room without a window?

I have just purchased a beautiful Aloe vera plant that I intended to place on a unit in the hallway of my flat. The hallway is a little corridor with no window. It has a ceiling light which I usually ...
4
votes
2answers
65 views

Edible, indoor, winter plants. What lights? (and other advice)

I don't have any outdoor gardening space and I'd love to grow some edible plants indoors, preferably during the winter when the sunlight is low. I understand I need non pollinated plants, since my ...
8
votes
1answer
125 views

Can you have a shade-loving plant under full sun?

While looking for information about caring for monstera deliciosa, I've sometimes read that they prefer shade. It seems this is the case for other plants as well, but I find it puzzling and I haven't ...
4
votes
2answers
154 views

What is the limiting factor in plants growth and production speed?

What is the limiting factor in plants growing and production speed given that all nutrients are adequate in the soil. Some factors I can think of: intensity of light concentration of CO2 in the ...
4
votes
2answers
940 views

Does moss require darkness when grown indoors?

People always say that moss prefers to grow in (moist) dark, dappled, shady, or otherwise low-light conditions. Strictly speaking, I don't believe that's the case. I think in a natural environment it ...
0
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0answers
32 views

Does moss require darkness? [duplicate]

Everybody knows that plants need light for photosynthesis, to grow and remain healthy; but do they require (or benefit from) sleep/darkness; or can they be bathed in light 24/7? I'm not talking about ...
10
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2answers
14k views

Can I cut the top off a drooping aloe plant?

I inherited this horrible aloe plant from an old roommate. It was living in a tall, skinny Tupperware in a dark corner of the kitchen, where it got knocked over and stepped on more than once. From ...
4
votes
1answer
68 views

How much light does a scented oak fern need?

Now I have been reading that ferns don't need a lot of light — so I got one. However, what I can't seem to find is just how much is meant by not a lot. I plan on keeping the fern in a room with ...
7
votes
1answer
639 views

Do indoor plants go dormant in winter?

I read that many plants go dormant in winter. I live in the Netherlands, and while outside temperatures are between -3 °C and 10 °C in winter, the temperatures in my room are always between 15 °C and ...
6
votes
2answers
145 views

T5 AgroLED, Hortilux PowerVEG FS + UV, UV and Mold

I am growing microgreens and wheatgrass and sometimes run into trouble with mold. I have read that mold can be controlled by using LED lights but I cannot seem to find anything more specific. I ...
7
votes
3answers
606 views

Why aren't my hydroponic plants growing well?

I started growing tomato and pepper plants in my indoor hydroponic system. The first two weeks after the transplantation all the plants were healthy, but after the second week, there hasn't been any ...
7
votes
1answer
185 views

What's a good alternative to Incandescent Christmas lights for frost protection?

I understand that gardeners used to wrap trees in Christmas lights to provide frost protection as incandescent lights gave off quite a bit of heat. Try as I might, I've been unable to find any ...
7
votes
2answers
589 views

What should I consider while building a grow-light system?

I will build a grow light system from LED lights for a 1m x 2m square area. I am planning to grow 6 plants (vegetables) in that area. I am a little tight in terms of budget. So I want to find cheapest ...
5
votes
2answers
115 views

How to isolate light in indoor growing?

I want to make an autonomous system that sustains light for indoor plants. For that purpose I want to isolate plant from outside light sources. In that way I can apply all kind of light cycles that I ...
4
votes
1answer
55 views

Difference in supplementary lighting between greens and strawberries?

I read that for greens like salad you can provide supplementary light hours (during night time) in order to increase the growing speed. Some species even tolerate continuous lighting. Is the same ...
1
vote
1answer
234 views

Have fluorescent lights in both rooms. How to protect Dumb Cane/Dieffenbachia?

From http://www.ourhouseplants.com/plants/dieffenbachia Light Another false belief about Dieffenbachia's is that they need very little light. This is actually wrong, light shade is acceptable but ...
3
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2answers
876 views

What is light when it comes to plants?

I often see and hear people saying "this plant needs light". What is light? Just sunlight(direct and indirect) or what else? My room doesn't get a bit of sunlight, direct or indirect, but there is ...
4
votes
1answer
139 views

How many watts should grow light supply per unit area of edible greens?

There are many lighting products with different rated power. What is the typical grow light intensity (power per unit area) for edible greens?
12
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1answer
12k views

Why are my aloe leaves turning white and brown?

I have had this plant of aloe for years, and it has always given me great satisfaction. Easy to take care of, I had separated it into different pots but now decided to keep it all together into a ...
8
votes
3answers
891 views

Is sunlight from my window enough to grow cherry tomato seedlings indoors?

It is my first time planting anything from seeds, and certainly my first time with cherry tomatoes. I've watched many tutorials and read many articles, so I have a fair knowledge about the subject. ...
8
votes
3answers
129 views

Solar driven LEDs to offset electricity for mass growing in a basement

I want to grow vegetables in my basement year round. I live in zone 3b, in a rural area and I'd like to start selling produce as well as providing food for my family as well. Ideally, I'd like to ...
6
votes
1answer
151 views

Help determine lighting requirements for wintering small plants indoors

I live in zone8. I have a few plants I've been experimenting with. I broke a few stems off a friends tropical flowering plant they got at Home Depot, and have been propagating them successfully, but ...
2
votes
1answer
102 views

Upper limit on light intensity?

What is the upper limit on the light intensity for growing plants indoor in a hydroponic system? Except my electricity bill off course :-) e.g. Are 1000W HPS light per sq.m. ok, as long you can keep ...
2
votes
1answer
215 views

Replacement for an F15T8NDL 18" lightbulb

I am currently using an F15T8NDL 18" lightbulb for my plants in a light fixture, and would like to replace it with something much brighter. So my question is that if I add a higher powered bulb in the ...
3
votes
1answer
39 views

Does anyone have some references on using metal halide lamps in a greenhouse?

I am looking for some references to use metal halide lamp in a greenhouse. What specifications should I look for in a lamp?
5
votes
1answer
2k views

Will solar lights around my vegetables and flowers be bad for them?

I have a decent size vegetable garden and various annual flowers in my back yard. I recently bought some solar lights and put it around the plants. The lights stays on all night long, and I wonder is ...
4
votes
1answer
165 views

Full-spectrum fluorescent light on hot pepper seedlings

I'm new to starting TAM Mild Jalapeno peppers from seed; this is my first time ever starting any peppers from seed. I was lent a full-spectrum fluorescent light yesterday, and I now have it turned on ...
6
votes
1answer
317 views

Is total darkness acceptable for tomatoes to recover from transplant shock?

After re-potting tomato seedlings from plugs to larger pots (that they'll live in for about a month before they go out in the garden) it is recommended to let the plants recover from transplanting by ...
6
votes
2answers
2k views

Why is my apple seedling shriveling up after like 15 min, every time I remove the plastic dome?

Around 7-9 weeks ago (maybe more) I planted a sprouted apple seed in a cup of potting soil that I placed on top of a low heat pad, and covered it with a plastic bag. I also have a full spectrum ...
6
votes
1answer
5k views

Am I meeting the light requirements for indoor dwarf citrus trees?

I've recently purchased 3 dwarf citrus trees that we plan to keep indoors for ~9 months of the year. We are in zone 6 so we can only reliably move the trees to the porch for June, July and August with ...
6
votes
3answers
2k views

What fluorescent bulb is best for my tomato seedlings?

It has been suggested that my seedlings may not be getting enough light. What are the best types of fluorescent lights to get? I have a single bulb, and looking to get another light or two to add to ...
4
votes
2answers
373 views

Is a skylight enough light for tomato seedlings?

I have a 2' x 4' domed skylight on a pitched roof, facing southeast. If I build a shelf so the seedlings sit a foot under this dome, will it be enough light to prevent leggy plants?