This is an auto-Tangerine, growing in coco/perlite at day 37. The tips of several of the new leaves near the top are looking yellow, not seen before. I’m feeding with Fox Farm hydro veg nutes at 1/2 strength (EC 1200-1300, ph 6-6.2). The other two plants in the tent, different strains at the same day of growth, do not show this problem.
From my reading, this could be too much light or too much nutes. Since the yellow tips are only near the top of plant, does that favor too much light? It is 18-20" from a 240 W LED light on 80% power (this is the distance the manufacturer, AC Infinity, recommends at this stage)
Looking excellent Grow Bro and nothing to be worried about. Tip burn is normal and letting you know the nutrient threshold has been hit. Most growers like seeing this. I use a different fertilizer line and around 800-1000 PPMs, you’re very safe at your level of 600-650 (EC 1.2-1.3). I would recommend liberal run off with the FF trio, it’s salt heavy and these can accumulate in the root zone
You got some good looking girls there. A little yellow in the tips is nothing to worry about. It just means you pushing her to be her best. It may not be showing in your other girls due to slightly different preferences in the strains or even small differences in water usage. Keep up the good work and happy growing.
Update: Day 42 (since seedling spouted - do people usually count from the day the seedling sprouts or from the start of germination?).
All three plants started flowering within the last few days, and are growing vigorously.
I’m growing 3 autos in a 3x3 tent. I’m growing in 70% Coco, 30% perlite, 3 gallon fabric pots. Temp 75-78, RH 50-60.
I’ve been using Fax Farms Hydroponic nutes at 1/2 strength, and just switched to the bloom formula.
Per gallon:
Botanicare CalMag 5ml
FF Big Bloom 8 ml
FF Grow Big 5 ml
FF Tiger Bloom, 2.5 ml
Plus General Hydroponics Armour Si (1 ml), GH Diamnod Nectar (4 ml) and RAW surfactant 25mg.
The FF feeding hydro schedule does not change the formula until week 9, when it increase Big Bloom to 10 ml.
Any reason to modify this formula if the plants are doing well ?
I’m using an AC Infinity Ionboard s33 light, on a 20/4 schedule.
On 100% power at 18", here is the PAR map:
With an average PPFD of about 900 ( 3 plants equally spaced apart), 20 hrs a day, I calculate a DLI of 72 - whereas the recommended DLI from this table is 45.
The amount of light your plants can handle varies widely based on environment, genetics, and health of the plant. The happier a plant is the more light they can tolerate and the faster they will grow. There is no one number for any growth phase they are just guidelines to start from
Three plants doing well - the 3x3 tent is already too small, plants scraping the walls.
Tanya (auto-Tangerine) in rear, and Betty (auto-Bruce Banner) in front right, started flowering 8 days ago, and are now stretching.
Blanca (auto-White Widow) had some issues as a seedling (I dropped her on the floor, and then she had a Calcium deficiency) and has been lagging, but is now in early flowering, and catching up in size.
Give me a little history on this one Growmie, what medium are you using, age of plant and your watering or feeding routine/frequency. Nutrients you’re using if you’re feeding synthetic fertilizer
The popular consensus seems to be town mag deficiency on not using any CalMax supplement whatsoever. I was told that I didn’t have to with the water we have around here. Local growers said that it’s got plenty of it in it so I don’t know
About 300-400 low on the PPMs, are you frequently feeding using the coco…every day or at least every other day? Coco should stay wet or damp.
What is the tap TDS? Do you have a water quality report that shows the water source mineral make up? Without this it’s hard to say if calcium is needed. It wouldn’t hurt to add some calcium and 1/2 teaspoon per gallon of Epsom salt will supply the magnesium
