When to switch from vegetative to flowering fertilizer?

M

markpx

Member

• Dec 26, 2021

• #1

I am growing outdoors, and have been feeding with a 9-4-8 fertilizer for the growing stage, and have a 4-8-8 I want to use for flowering. But I am not sure when should I switch to the flowering one.

Indoor you would usually switch when switching the lights to 12:12, but how do you do it outdoors? Do I start feeding with the flowering fertilizer after the summer solstice (which already happened on the southern hemisphere), since the days start to become shorter after that day. Or do I wait for the preflowers to start growing more calyxes and the plants to actually start flowering?

 

Herb & Suds

Well-Known Member

• Dec 26, 2021

• #2

5 th to 7th week

 

M

markpx

Member

• Dec 26, 2021

• #3

My plants usually take 7 to 9 months outdoors depending on when I start the seeds. They current ones are about 14 weeks old and only one started showing more calyxes other than the pre flowers. 5th week seems a little earlier for me, the weather conditions are far from ideal for flowering at that stage, at least for my plants and based on when I plant them.

 

buckaclark

Well-Known Member

• Dec 28, 2021

• #4

I believe most feed veg. through the stretch which is weeks after flowering starts.They still need N until then.

 

Swiller

Well-Known Member

• Jan 3, 2022

• #5

Aye buck, typically I get two weeks of veg growth, that’s when I trim the little stuff off in the interior.

 

adgas

Well-Known Member

• Jan 7, 2022

• #6

If you are in the southern half of aus then around aus day is when they really start to turn so around then.

 

OutdoorOpps

Active Member

• Jan 8, 2022

• #7

Wait for preflowers is what I do, but I only use liquid fertilizers for flowering and not always (depend on strain and if plants are in ground or in pot), I add bat guano at first preflowering sight and then one time more in mid flowering, but 20% or 30% of my soil is manure (cow/sheep) plus diy compost.

 

subwax

Well-Known Member

• Jan 8, 2022

• #8

I have 3 periods - veg, transition and bloom. I veg for a while, til the plant is roughly half the height I want it to be. Then I transition by change the light pattern to be 12 / 12, but keep the veg bulb and veg nutes in (to keep stretch down)- do this for 2 weeks. Then l fiush for a few days. replace the bulbs with the bloom ones, and start with the bloom nutrient regime.