greenhouse mechanics

Hi,

How it is possible that when I find a fruit/herbs plant in the forrest and I gather those fruits/herbs, they contain seeds.. But when I take those seeds, plant them into the green house, grow that same plant and gather it's fruit/herbs, there are not any seeds at all? (even more if there were seeds for the first time we gathered that plant)



Did you ever had a garden?  It does not work like that... 


Usually if you are able to grow a plant to mature state so it has ripe fruit you can gather, there are also some seeds - this is how the vast majority of plants which is growing fruit works.. There is not any reason for a plant to grow a fruit but produce seeds to achieve its own continuity..



I know this is a strange alien planet we are surviving on, but even on alien planet plants surely grow their fruit for their own reproduction rather then for feeding poor aliens (us) who crash landed on that planet...

Please help.



Thanks!



I didn't find the right solution from the Internet.



References:

forum.planet-nomads.com/archive/index.php/t-1028.html

Creative Promotional Examples