*50%Indica 50%Sativa,Sweet Seeds, Speed+ Automatic (7weeks from seed to Harvest time)
*Hydroponics medium Coco-Coir
*3 Gallon plastic pots with good drainage drilled at the bottom.
PH of Water for waterings always 6.1 For Nutes 5,5-6,3
PPM don’t have PPM pen EC Pen yet just using PH Pen for Water and Nutes.
Indoor
Mars Hydro TS-600 (100Watt)
Temps; Day 79-83 F or 26-28 C Night 73-74 F or 23-24 C
Humidity; Day 60-70% Night 60-70% (Using Programmable Humidifier with Warm Mist Ioniser)
Ventilation system; Yes Vortex Hurricane 8 inch Fan with speed control running slowly ducted to Carbon Filter Plus small 6 inch fan blowing the air around the tent (also speed controlled)
Humidifier, will add De-humidifier for flowering.
Co2; No but have bags just waiting to add CO2 Bag to my tent at week 3.
To the point I Grow in Coco-Coir Hydroponic medium mixed 70/30 with Perlite.
At day 8 I have fed them a very low dose of Nutrients.
Started mixing in this order Cal-Mag + (0,5 ml) Micro (0,25ml)Gro (0,25ml) Bloom(0.125ml)
Used a syringe to make sure it is spot on. Dose per quarter US Gallon of water.
Then I PH.d water to 6.1 and fed each seedling with 400ml of water (or 13,5 FL oz)
I have repeated the process at day 9 but this time used half a gallon of water and Nutes as follows
Cal-Mag Plus (1ml) Micro(0.5ml)Gro(0.5ml)Bloom(0,25ml) then Ph’d my water to 5,5 and fed them a quarter gallon of water to each seedling with nutes using precise watering can (not the spray type) To avoid touching leaves with nutes.
At day 10 I have stopped nutes to give them a break as it was showing great growth after receiving nutes and also to allow coco to slightly dry up.
Today morning at day 11 I have found those spots on my plants.
What do you think this might be?
Is it overwatering symptom ?
Is it Nutrient burn on the tips of serrated leaves?
Is it a deficiency?
Should I continue watering or wait till coco dries out completely?
Do I absolutely need an EC pen or PPM pen ? and can you advice good cheap one that doesn’t cost as much as my lights ? Ones I found were around 80 dollar mark.
My tap water is clean without chlorine and you can drink it right out of the tap.
Apologies for long topic but I must address those marks on the leaves or there will be one very sick seedling
I’ll wait for a coco grower weigh in for a specific suggestion on the leaves. I do have a couple suggestions. You do need a PPM meter or you will struggle to manage proper feeding levels. $80 is about as inexpensive as you will be able to find for a half way decent one. CO2 supplementation is a waste of money with your light. Plants need a lot of lighting to be able to utilize extra CO2. Save your money and use it to buy a decent PPM meter or to upgrade your lighting.
The long topic is a good thing. A lot of information helps us help you better.
This is actually ‘soilless’ or ‘media’ and not hydro.
Hopefully you have something in the wings to add as plants grow.
This is really a critical component of a good media grow. I will explain.
These are essentially worthless. Unless pushing HIGH PPF lights in a closed loop system with a high nutrient push you’re wasting your time and money.
You are not supposed to let coco dry out completely as it becomes hydrophobic.
At this age they should be domed and nutrients applied with an eyedropper lol. Solution concentration is unknown.
Cannabis likes loose airy media and coco does a good job of that. You are better off now to provide nothing but water until the first set of leaves (cotyledons) yellow. Then you can start feeding at 250 ppm of base nutes, working up to a peak of 700 ppm. (This is why you need a TDS meter)
Once you hit your target TDS over a couple of weeks, you should have 3 or 4 nodes on the plant by then. Do not water to runoff until the plant canopy matches diameter of pot. Once there you will water to runoff every day in a feed/water/feed/water cycle. Cal mag is applied during water only days. Everything PH’d to 5.5 to 5.8.
Probably a bit of damping off and some light nute burn. Water only should solve that: no flush til plant gets a root ball and canopy.
Thanks again for another pro advice.
What can I say about the lights is they were in a Mars Hydro Tent Bundle.
Which ones do you recommend that are not producing much heat and don’t have any fan coolers?
Would throw 300 watt led to this tent but slightly worried about energy bill skyrocketing if that’s on 24/7
Tent size is 2,25X 2,25 X 5,5 in feet
Regarding TDS pen it’s sorted got it today on ebay.
Regarding CO2 Bags I already have them at home. How powerful Lights do I need to replace the TS-600’s to fit in this tent to enable me to utilize them for Maximium Yield per square metre?.
I’m planning to LST the plant once in VEG and then Use SCROG net to maximise plant’s yield.
HLG 260 XL or 288. There are several models: it’s a $350 light but the thing is: in veg you can turn the light WAY down and in flower you will only need about 25 to 30 watts per square foot as opposed to the Mars hydro lights: they need 50 watts from the wall per square foot. You can either pay now or pay later. Those lights are silent and close to state of the art.
I’m running diy Samsung EB strips which are comparable although a few generations old. I did an RDWC grow last winter under 600 watts of gucci lights (in 24 square feet) and bottled up a few grams shy of two pounds of flower from those 3 plants. I calculated 1.24 grams per watt which is great and the newer lights it’s closer to 2 grams per watt.
