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Pokey Joe Cilantro: Nutrient Burn, Location Change, and Recovery

Grow log by pfunnyjoy · Original thread

5 visual updates8 photos21 replies
View recap
CropCilantro
VarietyPokey Joe
MethodAeroGarden hydroponics
EquipmentAeroGarden Harvest Elite Slim
Plants6
AudienceAdvanced

What you can learnA strong troubleshooting diary demonstrating cilantro pregermination, low-EC feeding, location effects, pH monitoring, and recovery.

Actions:3 Solution2 Pruning1 Roots1 Equipment1 Finished1 Nutrients
Useful practices
  • cracking and soaking cilantro seed
  • pregerminating in a bag
  • changing nutrient formulations
  • moving the garden to a new location
  • removing damaged leaves
Problems encountered
  • seedling nutrient burn
  • brown crispy leaves
  • high pH
  • possible air-purifier draft

*The days were calculated automatically and approximately.

Day 61
UPDATE#5
Grower update

Update #5

Actions taken

SolutionChanged the reservoir solution.
PruningRemoved most brown-spotted sprigs.
NutrientsRaised the nutrient strength.

P By pfunnyjoy

2024-02-19: Day 67Rinse & refill. The plants like their new location much better. Brown spots are still occurring, but nowhere near as many. I’ve had usable cilantro sprigs! And I figured out that I could reset the starting days, so my “goof” is erased like it never happened.I raised the nutrients a little. EC was 0.8 this morning. pH was 8.0! Probably the cause of the remaining brown spotting. I removed most of the brown spotted sprigs, and the garden looks nice!Hubby is fixing to enjoy some with his eggs right now!Nutrients (per gallon): 1.4ml GH CALiMAGic4.0g GH MaxiGro (approximately a half teaspoon)5.0ml 3% hydrogen peroxideNutrient mix pH: 5.5Nutrient mix EC: 1.4
Day 47
UPDATE#4
Grower update

Update #4

Actions taken

SolutionChanged the reservoir early.
FinishedRelocated the garden from the kitchen to the office.
PruningTrimmed off brown damaged foliage.

P By pfunnyjoy

2024-02-05: Day 54I haven't been updating, because frankly, the cilantro garden has been depressing to look at.Rinse & refill a day early. I’m trying out a location change. The cilantro has been drinking, growing, and the roots look OK. But the leaves come up green, then go brown and crispy shortly thereafter and I don’t get any usable cilantro. I've trimmed all the brown stuff off.I shouldn’t think they’d be getting nutrient burnt as 54-day-old plants, and if they were, they'd probably stop growing, right? They’ve been moved to a table in my office. I used to grow herbs successfully on the kitchen counter where these were, but that was back before the air purifier. Could be there’s too much draft from that. Unfortunately, though there is another outlet further down the living room wall, it’s in a very inconvenient spot to get at the air purifier for the monthly cleanout, so it needs to stay where it is. Note: The fan pictured in the background is not and has not been on! I did goof and accidentally hit “Start a new garden” somehow, ugh. Oh well, can’t be any worse than this garden already is!Nutrients (per gallon):1.0ml GH CALiMAGic3.0g GH MaxiGro (approximately a half teaspoon)5.0ml 3% hydrogen peroxideNutrient mix pH: 6.0Nutrient mix EC: 1.1
Conversation
P
pfunnyjoy

2024-02-07Plants still not happy. Checked pH, it was up to 8.0! In two days! EC still at 1.1.Took a guess, added 0.6ml of pH Down, and later in the afternoon, the pH was back to a more reasonable 6.0. Trimmed the leaves that had issues. Back to wait and see again.

L
lynnee

pfunnyjoy, my cherry tomatoes get crispy leaves like your cilantro leaves from time to time. I've been unable to isolate the cause.This morning a previously healthy plant has crispy leaves, and the most likely cause is the weather. It got very cold overnight, so that (1) the location near a cracked-open window got colder, and (2) the furnace ran more often (although the vent in that room is closed).Another possibility is that the plant ran out of nutrients. It was 2 weeks past its R&R date.R&R happened this morning, so we'll see whether lack of nutes caused the dried out leaves.

P
pfunnyjoy

The cilantro is continuing to get dry leaf edges. I'm beginning to wonder if it's just too fussy to grow in winter. Or whether this variety is pickier than some. It can hardly have run out of nutrients in 4 days, there's not been that much new growth.I hope your cherry tomatoes get happier with the nutrition! Mine get some bits of brown on the leaves, but it's fairly minimal and not wide spread, so it's not a worry. And I won't be eating the tomato leaves! The kale in the basement, particularly the more frilly Russian red, also gets a tiny bit of browning on some leaf edges, but it's not enough to worry over. I harvested 3 leaves yesterday to put in some beet/apple/red cabbage/ginger juice.I'm sure ready for winter to be over!

Day 11
UPDATE#3
Grower update

Update #3

P By pfunnyjoy

I'm hoping that once these plants get a little more mature, the leaf edge browning will stop. It's hard to believe an EC of 0.8 is causing nutrient burn. I'm wondering if it's something else.They are growing, and drinking a bit, so I'm hoping this resolves. Here's a closeup of what they look like:
Conversation
L
lynnee

That fan in the background may be causing the leaf browning. My plants look like that when they're in a draft.

P
pfunnyjoy

The fan is not running! It's just still sitting there from my first two failed gardens in that spot and has not been turned on since. I didn't see a reason to take it away, since if the cilantro/parsley gets thick (crossed fingers) it might be needed.So I think we can rule that out as a suspect in the crime, LOL!

L
lynnee

Okay, the fan is innocent! Is the room air very dry? I would still suspect an environmental factor.

P
pfunnyjoy

The house is kept around 40-50% humidity because I have severe dry eye syndrome and my eyes can't take much less than that for very long, unless I want to be putting in eyedrops nearly non-stop. It's been a relatively warm winter, with most days around or above freezing. It's dreary as all get out, but nothing extreme, so the humidifier is keeping up nicely.The Acurite hygrometer in the kitchen is currently reading 51%, so it shouldn't be too dry for plants.I keep thinking there's something about the nutrition it isn't quite happy with. EC of 0.6 it was relatively happy, no browning, but the leaves were on the pale side. Maybe the plants just need to stay at the lower EC until they get a bit bigger. Maybe I don't have the cal/mag balance right. The plants are growing, but I can see tiny brown tips on some, but not necessarily all of the new growth. I'm going to let it ride for now. Don't really know what else to do. I don't have a place to move the gardens to, so if cilantro doesn't grow well in this spot, I'll just have to grow something else in the Harvests. But I know I grew it in the past in the kitchen as that's where I've always grown herbs.

P
pfunnyjoy

2024-01-09: Day 27Rinse and refill.The little plants did not like the GH Flora mix I previously gave them. Lots of browning and what looks like nutrient burn. Didn’t have time until now to attempt rescue. I’ve checked the EC on my tap water again, and it’s risen slightly to 0.4. Perhaps I do not need the cal/mag or I need less of it. I’m giving them MaxiGro again, with NO cal/mag. I’ve cut all the damaged growth off, which is practically everything. Lowered the light slightly. I also cut the hydrogen peroxide amount. I’ve had no algae problems.If I’m going to use MaxiGro for seedlings, I am going to have to get a more accurate scale, one that can measure partial grams. My normal kitchen scale isn’t going to cut it. A ½ teaspoon is too high EC for seedlings (been there, done that) and I can’t level out smaller teaspoon amounts accurately; the powder is too coarse.Here’s hoping I can save the cilantro, which smells rather good, as damaged as it is.Nutrient mix:2.0g GH MaxiGro (as best as I could measure it)1.2ml pH Down3.0ml hydrogen peroxideNutrient mix PH: 6.5Nutrient mix EC: 1.0

Day 6
UPDATE#2
Grower update

Update #2

Actions taken

SolutionChanged the reservoir and switched to Flora-series nutrients.
RootsTrimmed longer roots to match the others.
EquipmentRaised the light one inch.

P By pfunnyjoy

2023-12-27: Day 14Rinse and refill. GH MaxiGro + CALiMAGic is hard to measure at low EC levels. I have 5ml syringes on order, but meanwhile, I’m switching to GH Flora series. Nutrients:2.0ml CALiMAGic per gallon2.5ml Flora Micro per gallon2.5ml Flora Gro per gallon2.5ml Flora Bloom per gallon5.0ml 3% hydrogen peroxideNutrient mix PH: 6.5Nutrient mix EC: 1.0 The EC is slightly high. I diluted to 0.8 when filling the reservoir. One leaf on the left-hand side is showing some edge browning. I raised the lights an inch. The two leftmost plants had longer roots; I trimmed them to be the same length as the other plants.There's a tiny touch of edge browning on these right-hand plants.Hoping for the best!
Conversation
L
lynnee

That's some tasty-looking parsley! The edge-browning (can't really see it in the photo) may not show up on the later leaves. Seedlings are more sensitive to drafts than mature plants.

P
pfunnyjoy

The edge browning is showing up more today, plus hints of leaf curling. I'm hoping if they can just get past the point of being seedlings, they'll manage to grow successfully. PH has risen slightly to 6.5, but still in range. I'm wondering if my light hood is too low. It is currently 4" above the plants, I just raised it slightly this morning.

Conversation
T
tdse

Looks fantastic!

P
pfunnyjoy

Let's hope! I think my first try was just too much nutrient. MaxiGro is strong stuff! I'd been watching the Aerogarden Experiments guy on YouTube, and he is always putting a whole teaspoon of MaxiGro in after his sprouts come up, including his cilantro video. But that's EC of like 2.2! Beyond what cilantro supposedly likes! I have no idea how he gets away with that!So I went cautiously on the first try and used a 1/2 TSP. And still got nutrient burn! The EC was something like 1.1, which should be fine for established cilantro plants, but apparently was too much for seedlings.These guys have barely any nutrition at all, LOL! EC of 0.6.And gosh, that reminds me, I need to get my parsley seeds for the other Harvest Slim into paper towel and ziploc baggie. Hopefully the extra long soak didn't hurt them, forgot all about it this AM.

S
slw

I love watching the Aerogarden Experiments guy (and sometimes I mimic his voice when talking to myself while working on my gardens...haha. I love the way he says "al-gea.") BUT... I don't agree with some of his methods. For one thing, I think he leaves cucumbers on the vine far too long; he waits until they start turning yellow to harvest. Nooooooooooooooooooo. He's interesting to watch but when all is said and done, "YMMV". I'm aggravated with my cilantro right now. I cracked seeds, soaked, planted 4 pods and only got one measly seedling. Of course I don't use much cilantro so there's that.

P
pfunnyjoy

That's why I like crack/soak/damp paper towel in Ziploc baggie method over the crack/soak/plant direct in AG. That way, when you plant a pod, you know you are putting a seed in that has, at least, germinated. So far, I've not failed to get a sprout as long as a cilantro seed was showing germination when I planted it in a pod. And I'm impatient, so I often do it when only the tiniest bit of root is showing.Yes, I've gathered the YMMV part of the AG Experiments guy. I love listening to him though! He's always growing some interesting green or other, and fun fruiting veggies as well. I think he'd have fewer algae problems if he used some 3% hydrogen peroxide, but each to his own, I suppose.I'm hoping to get enough cilantro to put small bunches in juice and maybe occasionally on salads or to make cilantro lime rice. But it's been years since I've grown it and never an entire Aerogarden full, so I have no idea what the yield will be like and my memory isn't telling me diddly. I'm even now wondering if I should have tried doing TWO plants per pod instead of one.

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