RE:Can you read Lyinpuss? 4.5 harvests is totally possible because they are growing hydroponically! Hydro weed will grow faster in vegetative mode than any other type of growing.Flowering time is flowering time and can't be cut short! But It they can surely save time when vegging.
Pros vs Cons
Hydro Pros for Growing Cannabis
Faster Growth – Faster vegetative growth than any other growing method, which can result in harvests that come in sooner.
Bigger Yields – Experienced hydroponic growers usually get bigger yields than experienced soil growers – given the same conditions (light, nutrients, etc).
Less Likely To Get Pests – Of all the grow types, hydroponic growers are least likely have their garden attacked by bugs or pests (though it’s definitely still possible). Many pests need soil as part of their lifecycle, and many growers accidentally introduce pests into their grow room when buying new soil.
Some Options Are Low Maintenance – Some hydro methods are relatively low maintenance, and many growers believe some options are as simple as growing in soil (learn more about different types of hydroponic setups below).