Originally Posted by paradoxlost
Yea the past couple go's we started 5 or so seeds in twenty gallons with cover crops. About to pop some beans in a 25 gallon
That's one factor for me.
You say you started 5 seeds or so before, and soon will start ‘some' more.
Let’s say you’re popping 30 regular seeds. Why would you want to start them in large containers when you don’t know the sex? Let’s say you end up with 15 males in large containers. What a waste, right? Even if you plan to reuse the soil, that’s a lot of unnecessary extra work.
Lots of other reasons as others have said. But this says it best:
Originally Posted by iTarzan
In the ground a seedling can shoot a tap root down as far as it wants and branch as far as it wants. It doesn't matter if the top part of the soil has minimal roots.
In a large pot the seedling shoots a tap root down as far as it wants and then branches out. You are losing the root space of much of the soil in the pot because the roots grow down and not up. When you start them in a small pot the root hits bottom and starts to grow around. You restrict it for a bit in a small container. When you up-pot the roots now can brach out and fill the next size container. When you finally up-pot to the large container you speak of that big pot has roots from top to bottom and the yield will be much bigger due to a larger rootmass than if you just started the seed in the large container to begin with.
That is the reason for up-potting.