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Questions tagged [fertilizer]

Nutritional supplements for soil. Use this tag with questions about how to use or how to choose fertilizers for specific plants.

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How much P2O5 should I add to tomatoes

My tomatoes are developing purple spots at the bottom leaves. This is supposed to be a phosphorus deficiency. Tomatoes are growing in pots. Small ones are in around 4 gallons (~14 L) and big ones are ...
sanjihan's user avatar
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4 votes
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42 views

What timeline is a fertilizer's NPK value based on?

Fertilizers' NPK values tell me how much nitrogen, phosphorus pentoxide, and potassium oxide equivalent they will have 'available' for my plants. The fertilizer may also contain nutrients are not '...
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I over-fertilized my lawn

I misread the application instruction on the Scotts Fertilizer bag and set the rotary spreader to 7 3/4 instead of 3. Is there anything I can do to prevent fertilizer burn? I applied the fertilizer ...
Steve's user avatar
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4 votes
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Giving Miracle Gro fertilzer to prayer plant

The instructions on the Miracle Gro package says "Mix 1/4 tsp in 0.5 gallon water". Yet, the prayer plant (Maranta leuconeura) needs very little water every day (if at all) and fertilizer once every ...
wrahool's user avatar
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3 votes
0 answers
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Interpreting soil test instructions

I tested my vegetable garden soil with a lusterleaf rapitest Soil Test Kit. My soil test came back as depleted for nitrogen and phosphorous, and adequate for potash. This is the section of the test ...
nuggethead's user avatar
3 votes
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26 views

When should I fertilize my plants?

I live in an apartment in Brooklyn that is south facing, and the situation is that I get more light in the winter than the summer because of the amount of trees there are in the backyard (it's very ...
stackuser's user avatar
3 votes
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37 views

Leaf scorch on perennials from fertiliser

Fertiliser was applied correctly but some of the leaves were wet and it was only watered off after signs of scorch and wilt. The leaves are scorched on some of the plants. Will the plants put on ...
Amy's user avatar
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2 votes
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Is it safe to eat brassicas that are fertilized using fish waste?

Some Brassica species such as Brassica juncea and Brassica oleracea (broccoli, cabbage, cauliflower, kale, etc.) are hyperaccumulators of heavy metals. If the soil where such plants grow is regularly ...
Flux's user avatar
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2 votes
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22 views

tools and techniques for determining nutrient status in plants

I am interested in tools and techniques, both commercial and academic, developed for determining nutrient status and identifying limiting nutrients in growing plants. My specific interest is in ...
sanjihan's user avatar
  • 1,653
2 votes
1 answer
43 views

Available (soluble?) vs. total phosphorus for seed starting

I'm going into my second year starting seeds in soil blocks, and this year I'm switching from a prepackaged fertilizer mix to making my own. I'm going largely from Elliot Coleman's original soil block ...
Daniel Slomovits's user avatar
2 votes
0 answers
59 views

Low ph lawn with high calcium levels

I am looking for recommendations how to fertilize while improving ph without further increasing the already high calcium levels. Any insights would be really appreciated.
Rizzor00's user avatar
2 votes
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96 views

Trumpet vine is not growing after 4 months

I purchased 4 Violet Trumpet Vine plants and planted them in a raised bed that I have built on the side of our garden shed. The problem is that none of them have grown at all within 4 months (since ...
mitchkman's user avatar
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Avocado pruning, fertilizing and repotting advice

My very leggy avocado plant is about 1 meter tall and seems to be suffering from chlorosis. I think I need to prune it to make it more bushy, fertilize it and repot it. In what order should I do these ...
Fleureine's user avatar
2 votes
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99 views

Should I repot these pineapples?

I planted both of these pineapples from ones I bought in the store. Are they fine in their current pots or should they be repotted? Any other care tips for them? They have been inside for a while, but ...
bill999's user avatar
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Does chicken manure interfere with fruit trees?

I have a lemon and orange tree which chickens roost in and poo around and causing the trees not to bear much fruit. What can I do to eliminate the nitrogen in the soil? I cannot move the chickens ...
Travis Walsh's user avatar
2 votes
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32 views

Biofertilizer usage frequency

Currently i have decided to use bio fertilizers such as phospobacteria and azospirillum to my garden plants. I am confused whether these needs to be used regurarly on the soil or is it a one time ...
Krishna P S's user avatar
1 vote
1 answer
44 views

How to use charcoal ash for

I have a lot of charcoal ash after doing BBQ and it is hard to throw it but I read somewhere, it can be good for grass, I have got patchy garden and my goal is to make it beautiful and lush. Will ...
localhost's user avatar
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Drooping peace lilly! Is it ok?

My peace Lilly is drooping and has brown/ yellow spots. is it overwatering or too dry ? I watered it last week But it was also recently fertilized. The soil is a bit moist around the stems but mainly ...
Plantlover's user avatar
1 vote
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24 views

how to obtain information on fertilizer amount per volume

Very simple question but hour long search with no answer. Concentration of fertilizer is relation ship of amount of fertilizer (either mass or molar) with volume, NOT with area, yet all fertilizers ...
atapaka's user avatar
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341 views

Onion(not peel) water for fertilizer?

I have heard several times that onion peel water is very good for fertilizer, but I never heard about onion itself. Is it good or bad for plants? I only heard if it can be used for insecticide, but I ...
Muhammad Dyas Yaskur's user avatar
1 vote
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16 views

How much fertilizer is too much when feeding mangoes

A Mango growing publication from University of Florida recommends a total of 1.5-3 lb of 8-3-9-2 fertilizer for example. (680-1360 g) My growing season is about 6-7 months (~26 weeks) and my ...
ammoun's user avatar
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1 vote
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35 views

How far is a espresso brew coffee nitrogen molecules to those able to be absorbed by plants?

I live in a small apartment with 3 small balconies, all of them full of plants. Most of the plants have big roots and are in too small pots, just because I don't have enough space or I have too many ...
riqui's user avatar
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1 vote
0 answers
155 views

How to dose ammonium chloride?

I stumbled upon a brick of ancient NH4Cl. I dissolved a teaspoon of it in water and fed it at the base of a young pelargonium. Despite sufficient sunlight it's leaves were yellowing so I assumed ...
Vorac's user avatar
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1 vote
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21 views

Does boron require chelation in alkaline soils

My soil test shows 0.4ppm Boron which puts its into the deficient category. I have few Mango seedlings and mature pear trees that show Boron deificiency. I tried foliar feeding but I would love to ...
ammoun's user avatar
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1 vote
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27 views

How to feed and mulch fruit bushes

I found some good information on looking after fruit trees of types common in the UK here (https://www.rhs.org.uk/advice/profile?pid=539) Essentially: Clear ground of grass around the trunk Apply ...
Mr. Boy's user avatar
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1 vote
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74 views

Optimal hydroponic nutrient solutions for different herbs

I'm planning to grow different herbs hydroponically: basil, sage, mint and thyme. I would like for the nutrient solutions for each herb to be the closest possible to the optimum. For basil I found ...
pelegs's user avatar
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1 vote
0 answers
25 views

Low cost, liquid acid fertilizer

I am growing strawberries which I read prefer acid soil to alkaline one. I also read that using water that were used for beans soaking is recommended as a fertilizer. Will using it make my soil more ...
Tal's user avatar
  • 111
1 vote
0 answers
19 views

Why is my Miranda not coming to full pitchers and it has brown spots?

I have a Miranda Nepenthes and I've had it for about 8 months or so. It is growing like crazy but I haven't had a pitcher to get to full maturity since it came in the mail. It starts to grow pitchers ...
Sharon Barefoot's user avatar
1 vote
0 answers
26 views

The leaves on my peace lily are turning brown and yellow, the tips as well as the edges?

I got a peace lily plant from ikea a 5 months ago and ever since then the tips of the leaves are turning brown, or some of the leaves will turn yellow and then go brown form the outside in. I water it ...
Ari Procopiadis's user avatar
1 vote
0 answers
530 views

Banana tree health declining after repotting, yellowing leaves

I recently received a banana tree as a gift and as it is starting to decline I am worried about it. First off, I live in southern Canada (London) so I don't have a tropical climate but its been quite ...
space_potato's user avatar
1 vote
0 answers
28 views

What should I do if my pepper plants got too strong of fertilizer and they are wilting?

Basically, I added too much fertilizer to my pepper plants unknowingly. I thought it would help them, but the ends of the pepper plants are starting to turn brown and their stems are weak. Also, one ...
kayleah_90's user avatar
1 vote
0 answers
32 views

What is causing my avocado tree rot on leaf

I’m a newbie to growing avocado tree. This guys been growing for afew months and has recently started getting light brown spots on one of its leafs. The other leafs look okay apart from one or two ...
Devon Nicholson's user avatar
1 vote
0 answers
43 views

Is this burnt from fertilizer?

I plant this about two months ago and now it is showing yellow leaves I think it is due to some powder-like fertilizer I put around the root (5 inches away) and bury in the compost when I planted it. ...
HP.'s user avatar
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1 vote
0 answers
41 views

Best practices for watering plants with geothermal water

My new home uses a geothermal water system, so the sulfur levels are high (based on the lovely rotten-egg smell). I've read that sulfur can be really good for plants, but I'm wary about the amounts I'...
Gwendolyn's user avatar
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0 votes
0 answers
24 views

What do you recommend as the best way to feed watermelon?

My planting scheme is relatively small: 70cm*100cm. I planted watermelon from seedlings, but I want to know from you what they fertilize in the West. Because in Ukraine we have organic or chemical ...
Village-Life.biz's user avatar
0 votes
0 answers
49 views

My idea for using activated carbon in the garden

I have a 20 liter bucket of liquid fertiliser. I mixed some grass clippings and some twigs and branches and added saltpetre, gypsum, and epsom salts to it. I must say I was surprised at how terrible ...
Neil Meyer's user avatar
0 votes
0 answers
71 views

How long to see results in citrus tree after soil remediation?

I recently discovered that a nutrient imbalance might be contributing to a grapefruit tree having fruit with thick rinds and no fruit/pulp. Here's the explanation I'm working from. If I add bone meal ...
ASimonis's user avatar
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0 votes
0 answers
55 views

Which NPK range are lawn starter fertiliser?

When watching videos on YouTube they talk about lawn starter fertilisers, where it is important to use such when seeding, so the new seeds doesn't burn. But what NPK range are considered to be lawn ...
Sandra Schlichting's user avatar
0 votes
0 answers
39 views

Fertilizers with harmful levels of salts

I read in some articles that potassium chloride and ammonium sulphate can lead to salinity buildup. Is there a simple way to tell by looking at the fertilizer formula if a fertilizer can increase salt ...
ammoun's user avatar
  • 471
0 votes
0 answers
22 views

What are these white granules at the leaf-ends of my gold fruit palm?

I have had a gold fruit palm in my apartment for over a year now, and it has always been happy and healthy. Recently I have begun fertilising it once a week or so with a (German) liquid palm ...
Tempest16's user avatar
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0 votes
0 answers
264 views

How long can you store liquid tomato food after mixing?

I've bought a bottle of concentrated tomato feed. The mix ratio is 25ml concentrate to 4L I was hoping to mix a large amount in a tank and connect it to a gravity fed dripper irrigation system. I ...
Ben Page's user avatar
  • 101
0 votes
0 answers
1k views

Can I recover my lawn from fertilizer burn?

I was hoping to improve my lawn. I used Scott's Weed & Feed with a little GrubX in hopes of killing weeds and improving the look of my lawn. (Fig A) I didn't think I over did it, but obviously ...
Marinaio's user avatar
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