Led Grow Plant Growth Stages & LED Lighting 2

Question 1

For autoflowering cannabis strains, what light schedule is most commonly used from seed to harvest?

Accepted Answer

18/6 throughout the entire life cycle

Answer

Autoflowering strains flower based on age rather than light cycles, so most growers run 18/6 throughout for maximum photosynthesis and yield.

Question 2

What is the 'canopy management' technique most important for maximizing LED grow light efficiency?

Accepted Answer

Training plants to maintain an even, flat canopy at equal distance from the LED

Answer

Maintaining a flat, even canopy (through LST, SCROG, or topping) ensures all bud sites receive equal PPFD from the LED, maximizing yield.

Question 3

What plant symptom indicates that LED light intensity is too low during the flowering stage?

Accepted Answer

Loose, airy buds with extended internodal spacing

Answer

Insufficient PPFD during flowering results in loose, airy, low-density buds as plants lack enough energy for full trichome and bud development.

Question 4

What is the 'late flowering' LED lighting strategy some growers use in the final 2 weeks before harvest?

Accepted Answer

Increasing red/far-red spectrum and reducing blue to maximize resin and terpene production

Answer

Shifting spectrum toward red/far-red in late flowering can enhance resin production and terpene development as plants approach maturity.

Question 5

What is 'photoinhibition' and when can it occur in LED grow rooms?

Accepted Answer

A decrease in photosynthesis efficiency caused by excessive light intensity damaging photosystems

Answer

Photoinhibition occurs when PPFD exceeds a plant's capacity to process light, damaging photosystem II and temporarily reducing photosynthetic efficiency.

Led Grow Practice Test

Led Grow Practice Test

Led Grow Plant Growth Stages & LED Lighting 2