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Slow growth and hooked leaves

Soulstik

New Member
I'm wondering if anyone knows what exactly is going wrong with my grow. I water is every other day, twice a month I provide nutes, its on a 16hr/8hr cycle, room kept at about 75F to 80F. Pics bellow.

Photo_Jul_27_5_40_12_PM.jpg
 

Lyra

New Member
Re: Slow growth and hooked leaves.

You may be over watering. Let the soil dry until the pot is light before you water again. Remember she needs oxygen in her roots, if they're always soggy she'll suffocate.

How big is that pot? She might need more room, looks kind of small especially since it's not filled to the top.
 

indica vet

Well-Known Member
Re: Slow growth and hooked leaves.

what is the air circulation like across the canopy?
plants cannot breathe in still air, disregard if im way off.
looks a lot like an abundance of N , ph checked?
 

Lyra

New Member
Re: Slow growth and hooked leaves.

Too much nitrogen usually makes the leaves look very dark green. The color on my screen may be off but it looks like a good shade to me?

If it's a very dark green flush your soil and only use water until she starts to lighten up a bit. She will feed off the excess N in her leaves.
 

indica vet

Well-Known Member
Re: Slow growth and hooked leaves.

true to that lyra but a ph issue can cause another deficiency that is hardly visible due to the N tox thus lightening the leaves a little
 

indica vet

Well-Known Member
Re: Slow growth and hooked leaves.

we are all here in one big symbiotic relationship to further education and awareness about this wonderful plant.
new growers get to garner info from hundreds of seasoned growers and adapt this info to what works for them.
and the seasoned growers never stop learning as peeps like co finest and light addict just keep evolving.
this place rocks .:)
 

Blueballavngr

New Member
Re: Slow growth and hooked leaves.

This was a post from sir grow alot that was invaluable to me. Re: Tea brew organic soil... Too vibrant to be true ?
check this out first...try to self diagnose and we can compare our findings. You have access to the plant and can look at it in its entirety and tell where to go on the solver here:
once you think you know, post it here and we will see if we came up with the same thing.

fun way to learn.plus this solver should be bookmarked and saved for future use


To use the Problem-Solver, simply start at #1 below. When you think you've found the problem, read the Nutrients section to learn more about it. Diagnose carefully before making major changes.

1) If the problem affects only the bottom or middle of the plant go to #2. b) If it affects only the top of the plant or the growing tips, skip to #10. If the problem seems to affect the entire plant equally, skip to #6.

2) Leaves are a uniform yellow or light green; leaves die & drop; growth is slow. Leaf margins are not curled-up noticeably. >> Nitrogen(N) deficiency. b) If not, go to #3.

3) Margins of the leaves are turned up, and the tips may be twisted. Leaves are yellowing (and may turn brown), but the veins remain somewhat green. >> Magnesium (Mg) deficiency. b) If not, go to #4.

4) Leaves are browning or yellowing. Yellow, brown, or necrotic (dead) patches, especially around the edges of the leaf, which may be curled. Plant may be too tall. >> Potassium (K) deficiency. b) If not, keep reading.

5) Leaves are dark green or red/purple. Stems and petioles may have purple & red on them. Leaves may turn yellow or curl under. Leaf may drop easily. Growth may be slow and leaves may be small. >> Phosphorus(P) deficiency. b) If not, go to #6.

6) Tips of leaves are yellow, brown, or dead. Plant otherwise looks healthy & green. Stems may be soft >> Over-fertilization (especially N), over-watering, damaged roots, or insufficient soil aeration (use more sand or perlite. Occasionally due to not enough N, P, or K. b) If not, go to #7.

7) Leaves are curled under like a ram's horn, and are dark green, gray, brown, or gold. >> Over-fertilization (too much N). b) If not, go to #8…

8) The plant is wilted, even though the soil is moist. >> Over-fertilization, soggy soil, damaged roots, disease; copper deficiency (very unlikely). b) If not, go to #9.

9) Plants won't flower, even though they get 12 hours of darkness for over 2 weeks. >> The night period is not completely dark. Too much nitrogen. Too much pruning or cloning. b) If not, go to #10...

10) Leaves are yellow or white, but the veins are mostly green. >> Iron (Fe) deficiency. b) If not, go to #11.

11) Leaves are light green or yellow beginning at the base, while the leaf margins remain green. Necrotic spots may be between veins. Leaves are not twisted. >> Manganese (Mn) deficiency. b) If not, #12.

12) Leaves are twisted. Otherwise, pretty much like #11. >> Zinc (Zn) deficiency. b) If not, #13.

13) Leaves twist, then turn brown or die. >> The lights are too close to the plant. Rarely, a Calcium (Ca) or Boron (B) deficiency. b) If not… You may just have a weak plant.


The Nutrients:

Nitrogen - Plants need lots of N during vegging, but it's easy to overdo it. Added too much? Flush the soil with plain water. Soluble nitrogen (especially nitrate) is the form that's the most quickly available to the roots, while insoluble N (like urea) first needs to be broken down by microbes in the soil before the roots can absorb it. Avoid excessive ammonium nitrogen, which can interfere with other nutrients. Too much N delays flowering. Plants should be allowed to become N-deficient late in flowering for best flavor.

Magnesium - Mg-deficiency is pretty common since marijuana uses lots of it and many fertilizers don't have enough of it. Mg-deficiency is easily fixed with ¼ teaspoon/gallon of Epsom salts (first powdered and dissolved in some hot water) or foilar feed at ½ teaspoon/quart. When mixing up soil, use 2 teaspoon dolomite lime per gallon of soil for Mg. Mg can get locked-up by too much Ca, Cl or ammonium nitrogen. Don't overdo Mg or you'll lock up other nutrients.

Potassium - Too much sodium (Na) displaces K, causing a K deficiency. Sources of high salinity are: baking soda (sodium bicarbonate "pH-up"), too much manure, and the use of water-softening filters (which should not be used). If the problem is Na, flush the soil. K can get locked up from too much Ca or ammonium nitrogen, and possibly cold weather.

Phosphorous - Some deficiency during flowering is normal, but too much shouldn't be tolerated. Red petioles and stems are a normal, genetic characteristic for many varieties, plus it can also be a co-symptom of N, K, and Mg-deficiencies, so red stems are not a foolproof sign of P-deficiency. Too much P can lead to iron deficiency.

Iron - Fe is unavailable to plants when the pH of the water or soil is too high. If deficient, lower the pH to about 6.5 (for rockwool, about 5.7), and check that you're not adding too much P, which can lock up Fe. Use iron that's chelated for maximum availability. Read your fertilizer's ingredients - chelated iron might read something like "iron EDTA". To much Fe without adding enough P can cause a P-deficiency.

Manganese - Mn gets locked out when the pH is too high, and when there's too much iron. Use chelated Mn.

Zinc - Also gets locked out due to high pH. Zn, Fe, and Mn deficiencies often occur together, and are usually from a high pH. Don't overdo the micro-nutrients-lower the pH if that's the problem so the nutrients become available. Foilar feed if the plant looks real bad. Use chelated zinc.

Check Your Water - Crusty faucets and shower heads mean your water is "hard," usually due to too many minerals. Tap water with a TDS (total dissolved solids) level of more than around 200ppm (parts per million) is "hard" and should be looked into, especially if your plants have a chronic problem. Ask your water company for an analysis listing, which will usually list the pH, TDS, and mineral levels (as well as the pollutants, carcinogens, etc) for the tap water in your area. This is a common request, especially in this day and age, so it shouldn't raise an eyebrow. Regular water filters will not reduce a high TDS level, but the costlier reverse-osmosis units, distillers, and de-ionizers will. A digital TDS meter (or EC = electrical conductivity meter) is an incredibly useful tool for monitoring the nutrient levels of nutrient solution, and will pay for itself before you know it. They run about $40 and up.

General Feeding Tips - Pot plants are very adaptable, but a general rule of thumb is to use more nitrogen & less phosphorous during the vegetative period, and the exact opposite during the flowering period. For the veg. period try a N:p:K ratio of about 108 (which of course is the same ratio as 2016), and for flowering plants, 48. Check the pH after adding nutrients. If you use a reservoir, keep it circulating and change it every 2 weeks. A general guideline for TDS levels is as follows:
seedlings = 50-150 ppm; unrooted clones = 100-350 ppm; small plants = 400-800 ppm; large plants = 900-1800 ppm; last week of flowering = taper off to plain water. These numbers are just a guideline, and many factors can change the actual level the plants will need. Certain nutrients are "invisible" to TDS meters, especially organics, so use TDS level only as an estimate of actual nutrient levels. When in doubt about a new fertilizer, follow the fertilizer's directions for feeding tomatoes. Grow a few tomato or radish plants nearby for comparison.

PH - The pH of water after adding any nutrients should be around 5.9-6.5 (in rockwool, 5.5-6.1). Generally speaking, the micro-nutrients (Fe, Zn, Mn, Cu) get locked out at a high pH (alkaline) above 7.0, while the major nutrients (N, P, K, Mg) can be less available in acidic soil or water (below 5.0). Tap water is often too alkaline. Soils with lots of peat or other organic matter in them tend to get too acidic, which some dolomite lime will help fix. Soil test kits vary in accuracy, and generally the more you pay the better the accuracy. For the water, color-based pH test kits from aquarium stores are inexpensive, but inaccurate. Invest in a digital pH meter ($40-80), preferably a waterproof one. You won't regret it.

Cold - Cold weather (below 50F/10C) can lock up phosphorous. Some
varieties, like equatorial sativas, don't take well to cold weather. If you can keep the roots warmer, the plant will be able to take cooler temps than it otherwise could.

Heat - If the lights are too close to the plant, the tops may be curled, dry, and look burnt, mimicking a nutrient problem. Your hand should not feel hot after a minute when you hold it at the top of the plants. Raise the lights and/or aim a fan at the hot zone. Room temps should be kept under 85F (29C) -- or 90F (33) if you add additional CO2.

Humidity - Thin, shriveled leaves can be from low humidity. 40-80 % is usually fine.

Mold and Fungus - Dark patchy areas on leaves and buds can be mold. Lower the humidity and increase the ventilation if mold is a problem. Remove any dead leaves, wherever they are. Keep your garden clean.

Insects - White spots on the tops of leaves can mean spider mites
underneath.

Sprays - Foilar sprays can have a "magnifying glass" effect under bright lights, causing small white, yellow or burnt spots which can be confused with a nutrient problem. Some sprays can also cause chemical reactions.

Insufficient light - tall, stretching plants are usually from using the wrong kind of light.. Don't use regular incandescent bulbs ("grow bulbs") or halogens to grow cannabis. Invest in fluorescent lighting (good) or HID lighting (much better) which supply the high-intensity light
that cannabis needs for good growth and tight buds. Even better, grow in sunlight.

Clones - yellowing leaves on unrooted clones can be from too much light, or the stem may not be firmly touching the rooting medium. Turn off any CO2 until they root. Too much fertilizer can shrivel or wilt clones - plain tap water is fine.
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go4snypr

Well-Known Member
Re: Slow growth and hooked leaves.

Too much nitrogen usually makes the leaves look very dark green. The color on my screen may be off but it looks like a good shade to me?

If it's a very dark green flush your soil and only use water until she starts to lighten up a bit. She will feed off the excess N in her leaves.

looks like a good shade to me too, but the curl or "the claw" look to the leaves make me say Nitrogen toxicity....
 

Soulstik

New Member
Re: Slow growth and hooked leaves.

I've waited for the soil to become light and dry, now i'm going to water it with ph'd water (6.5ph), now i'm thinking since she's small enough, I could possibly transplant to a better soil (I'm using Miracle Grow Organic), I have super soil that I've been composting that's finally ready to be used. Over the next few weeks I will stop all nutes and use only fresh ph'd water.

All your advice has been very helpful, hopefully someone else will find as much info here as I have. I will as well post again here with updates as to how she's doing with all the fixes you all have been so kind to provide. Thanks!
:cheer:
 

Soulstik

New Member
Re: Slow growth and hooked leaves.

what is the air circulation like across the canopy?
plants cannot breathe in still air, disregard if im way off.
looks a lot like an abundance of N , ph checked?

Air circulation is good, I have a fan that is sucking air into the room through ventilation ducts, and then its hooked up to another fan dragging air out of the room through a carbon filter. ph is at a solid 6.5.
 

Soulstik

New Member
Re: Slow growth and hooked leaves.

Nitrogen toxicity??

I believe that this might actually be whats wrong with her, the leaves are light and are yellowing at the bottom as well, but I know it has good nutes, ph is at 6.5, and the soil is only a few inches away from the top. I'd say it was only about an inch if that.
 

indica vet

Well-Known Member
Re: Slow growth and hooked leaves.

and if its time release ferts in the miracle grow that will cause lots of problems likely.

yep yep yep...hence to much N if also adding extra nutes. ph also spikes out of nutrient availabilty range and can cause deficiencies of other nutrients .
 

Soulstik

New Member
Re: Slow growth and hooked leaves.

I transplanted it today, Will update in the next few hours/days and let you all know how its going.

Signs look good, new soil I brought in might have contained spider mites though, my plant was covered in a cobweb like silk, it was light and came apart easily (unlike most spider webs) I am keeping a good eye on it and hopefully its not spider mites. The soil is Fox Farm organic. The plant itself however has resumed natural growth, the leaves have started to come out of "the claw" state.
 
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