Look droopy near end of light cycle

[kayanow]

I have 5 seedlings under a 400w (about a meter under) temp is 24-25c, small room, small window opened 1-2'' wide, small ocillating fan, room door closed. Two plants although seeded at the same time are over twice the size of other 3 -- all were revived after many leaves turning yellow due to 10 times too much nute. I pruned dead leaves, flushed 3 times, adjusted to correct nute strength and plants revived in a few days and began growing healthy leaves.

 

One problem -- they start to droop about 2-3 hrs before the light is due to turn of f -- even though they have enough water and temp is not higher than 26c tops. Do I need more ventilation or is 18hrs too much for them. They are nearly 5 weeks old. ???Cheers.

[Hanky]

Too much water will make them droop too. What's your watering schedual?

[kayanow]

I don't have one -- yet. I have 3 of them in the gravity system aquamiser -- the small ones. I transplanted 2 into 12' pots and just have them sitting on sponges in 1/4" of nute water in a tray. Yet they all droop in the morning when i get up - 8-9am light goes off at 11am.

 

What's good watering schedule for plants a 1 ft tall? Eg pour 500mls in pot every day? Not have them on wet sponges? Any info would help, thanks.

[Roadblock]

Starting to droop before lights off is normal in growth, they are going too sleep, if they are standing up like nice little soldiers just before lights on you dont have a problem .

 

Rod

[sydneyguy]

Leaves

The exchange of oxygen and carbon dioxide in the leaf (as well as the loss of water vapor in transpiration) occurs through pores called stomata (singular = stoma).

 

Normally stomata open when the light strikes the leaf in the morning and close during the night.

The immediate cause is a change in the turgor of the guard cells. The inner wall of each guard cell is thick and elastic. When turgor develops within the two guard cells flanking each stoma, the thin outer walls bulge out and force the inner walls into a crescent shape. This opens the stoma. When the guard cells lose turgor, the elastic inner walls regain their original shape and the stoma closes.

 

Time Osmotic Pressure, lb/in2

7 A.M. 212

11 A.M. 456

5 P.M. 272

12 midnight 191

The table shows the osmotic pressure measured at different times of day in typical guard cells. The osmotic pressure within the other cells of the lower epidermis remained constant at 150 lb/in2. When the osmotic pressure of the guard cells became greater than that of the surrounding cells, the stomata opened. In the evening, when the osmotic pressure of the guard cells dropped to nearly that of the surrounding cells, the stomata closed.

[WantDaChronic]

100% normal, nothing to worry about...bet you'd feel droopy too after being awake for 18 hours and doing nothing but growing up and producing thc

[Gazza2001au]

im with hanky on this one sounds like to much water (soil) water twice a week the leaves do drop a little just before dark but not enough to make u ask what is happening your plants should always look happy leaves not pointing up or down