Hydroponics 101
What does hydro mean?
Water
What are the 3 things plants need to germinate?
Water, oxygen, warmth
This system is known as passive hydroponics
Wicking
A seed is planted in cold April soil. What is the problem? Will it germinate?
Problem = no warmth
Germination = yes, initially, but the cold will significantly slow it down or stop germination
What is the outermost layer of a seed?
Seed coat
Give an example of a type of growing medium.
Rockwool, coconut coir, perlite, expanded clay
Define germination.
The process in which a seed breaks dormancy and begins to sprout.
This system is the most popular commercial system.
NFT (Nutrient Film Technique)
An elementary teacher wants a small hydroponic system for her classroom.
- Low budget, No pumps preferred, Growing small herbs, Easy for kids to manage
Wicking
Which part of the seed turns into the first root?
Radicle
How many main types of hydroponic systems are there?
5
Which element is known as the trigger for starting the germination process?
Water
This system has a high startup cost due to being high-tech.
Seeds are sealed in an airtight container with a moist paper towel. What is the problem? Will it germinate?
Problem = lack of oxygen after time
Germination = yes initially, but as soon as oxygen is used up, germination will cease
Which part of the seed is known for food storage?
Cotyledon
Yield
Which element allows seeds to convert stored sugars into ATP?
Oxygen
This system would be at high risk for drowning plants without a functioning air pump.
DWC (Deep Water Culture)
EC is measured through salt concentration. If the EC is too high in a system, what should be added/taken away to correct the issue?
pure water should be added
Which part of the seed is known as the part that sprouts above ground?
Plumule
What is the purpose of the growing medium?
stability and aeration
Which element controls the speed of germination?
Temperature (warmth)
This system most represents traditional agriculture and is highly customizable to plant needs.
Ebb & Flow
The pH required by a plant is 6.2. If the pH suddenly changes what becomes less available to the plant?
Nutrient availability is decreased
What is the purpose of the seed coat?
Protective layer