Help with drip!

outdooguy24

Active Member
Hey so i have a 55 gallon drum full of water hooked up to a timer and a 5.8GPM drip 25 psi drip system. I have 5 plants in 5 gallon pots. How often and for how long should I run them every day and week? Please help...thanks!
 

madodah

Well-Known Member
Hey so i have a 55 gallon drum full of water hooked up to a timer and a 5.8GPM drip 25 psi drip system. I have 5 plants in 5 gallon pots. How often and for how long should I run them every day and week? Please help...thanks!
You mean 5.8GPH?

I have a full drip system for 24 plants with 60PSI reduced to 20PSI at the line solenoid from a well pump. I've long asked the question of what GPH drip heads (emitters) on several weed forums and never received any response, so I eventually went to a master gardener and received the following instructions:

1. Use 1GPH emitters for all plants. The slower water enters well-amended soil the better the absorption rate.

2. I hand water my 5-week old plants under lights 14/10 with 8oz/day, including 4-hours in the sun daily for the last week to harden them (amended soil with excellent drainage). They go outside full-time today (remaining in 3.5 gal pots until sexed) and will get 5-minutes of drip per day, adjusted as required.

3. 128 ounces in a gallon divided by 60-minutes equals 2.13-ounces per minute of 1GPH drip, which I'm increasing to 5-minutes due to the increased lumen from direct sunlight.

4. Let your plants tell you when they need more water. A little wilting from being under watered won't hurt them, they snap right back and let you know to increase the water, while over watering them in pots is asking for root rot.

5. The females will go in 3' deep holes with damp, amended soil. At that point I'll up the time to 15-minutes of watering and adjust accordingly as the summer heat begins and those babies do suck-up the water.

6. When full summer heat requires more than 1GPH daily, you can increase time or add 1GPH emitters. For in-ground plants I'll have 3-4 1GPH emitters around the plant at the height of summer heat. Always run your drip about 4am, or before your sun comes up.

Sorry for all the rambling, but there's no simple, easy way to grow quality weed.
 

outdooguy24

Active Member
Thanks for your response man, I have had trouble getting an answer to this as well. The timer I have says up to 5.8 GPM but my system runs 0.5 GPH Drippers. Based on what you said, my plants would be getting about an ounce of water per minute and I was thinking of running them 3 times a day for 15 minutes twice a week to begin with. Temps here are in the 80's now but get into the high 90's and higher in the summer. Does this watering schedule sound good to start? And then increase to 3-4 times per week once it gets hot? Thanks again really appreciate it
 

easygrinder

New Member
i would advise getting variable drippers, ranging from a slow flow to unregulated, you will want a slower flow for feeding but will need a better flow for flushing
 

outdooguy24

Active Member
i would advise getting variable drippers, ranging from a slow flow to unregulated, you will want a slower flow for feeding but will need a better flow for flushing
My plan is to flush by hand once a month and let the drippers take care of the plants the rest of the time. Water is nearby, so I got lucky with that!
 

madodah

Well-Known Member
Thanks for your response man, I have had trouble getting an answer to this as well. The timer I have says up to 5.8 GPM but my system runs 0.5 GPH Drippers. Based on what you said, my plants would be getting about an ounce of water per minute and I was thinking of running them 3 times a day for 15 minutes twice a week to begin with. Temps here are in the 80's now but get into the high 90's and higher in the summer. Does this watering schedule sound good to start? And then increase to 3-4 times per week once it gets hot? Thanks again really appreciate it
The technical answer, which I follow, is all managed irrigation (including open furrow, sprinkler and drip) is normally done at night to avoid evaporation loss from daytime sun heat. What you're doing is getting water to the soil (which should have all the nutrients the plant requires) that the plant's roots absorb to feed the sun's demands. When is the issue.

Soil cools at night and absorbs that water more efficiently to hold it for the plant's sunlight growth process while allowing it to absorb the soil nutrients. When the sun makes it's demands on the plant the soil is ready to meet them.

I'd put what amount of water you think is right that can carry the plant's requirements through the day in an hour before dawn. One drip operation and the plant will immediately tell you (from drooping) if its not getting enough moisture.

Good pH and moisture testers (not the home improvement store garden selection) are a great investment if you plan to get serious about growing quality outdoor weed.
 

easygrinder

New Member
The technical answer, which I follow, is all managed irrigation (including open furrow, sprinkler and drip) is normally done at night to avoid evaporation loss from daytime sun heat. What you're doing is getting water to the soil (which should have all the nutrients the plant requires) that the plant's roots absorb to feed the sun's demands. When is the issue.

Soil cools at night and absorbs that water more efficiently to hold it for the plant's sunlight growth process while allowing it to absorb the soil nutrients. When the sun makes it's demands on the plant the soil is ready to meet them.

I'd put what amount of water you think is right that can carry the plant's requirements through the day in an hour before dawn. One drip operation and the plant will immediately tell you (from drooping) if its not getting enough moisture.

Good pH and moisture testers (not the home improvement store garden selection) are a great investment if you plan to get serious about growing quality outdoor weed.
i'm sorry but this is not great advice at all,

air temperature cools much quicker than water temperature when the lights go off, so feeding now will increase humidity incredibly, if your plant is in flower your going to increase the risks of budrot by feeding so late
 

madodah

Well-Known Member
i'm sorry but this is not great advice at all,

air temperature cools much quicker than water temperature when the lights go off, so feeding now will increase humidity incredibly, if your plant is in flower your going to increase the risks of budrot by feeding so late
What lights? The object is to get water into the soil before the sun comes up to avoid evaporation which creates humidity.
 

outdooguy24

Active Member
The technical answer, which I follow, is all managed irrigation (including open furrow, sprinkler and drip) is normally done at night to avoid evaporation loss from daytime sun heat. What you're doing is getting water to the soil (which should have all the nutrients the plant requires) that the plant's roots absorb to feed the sun's demands. When is the issue.

Soil cools at night and absorbs that water more efficiently to hold it for the plant's sunlight growth process while allowing it to absorb the soil nutrients. When the sun makes it's demands on the plant the soil is ready to meet them.

I'd put what amount of water you think is right that can carry the plant's requirements through the day in an hour before dawn. One drip operation and the plant will immediately tell you (from drooping) if its not getting enough moisture.

Good pH and moisture testers (not the home improvement store garden selection) are a great investment if you plan to get serious about growing quality outdoor weed.
OK so when I start them off with clones if I run the drip before sunrise for 20 minutes twice a week at 0.5 GPH that would be about 20 ounces of water each watering session. Do you think this is enough? Thanks man
 

madodah

Well-Known Member
OK so when I start them off with clones if I run the drip before sunrise for 20 minutes twice a week at 0.5 GPH that would be about 20 ounces of water each watering session. Do you think this is enough? Thanks man
I don't know your soil and you do already have some heat. I suggest a trial period, letting them tell you if that's not enough. And they will. If you're getting over 80° weather I'd sure check them every day until you determine what's right. 2-3 days with a lack of water in heat would not be good for them.
 
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