Dont bother with the pesky pink plants. Get yourself a red dye from flowers, make many red sheep and white sheep not pink sheep. Desyth the wool make red dye and bonemeal. Make pink dye from the bonemeal and red dye. Much more productive.
Look for other means of making some of the elements, decompose and remake. I took the time to look for renewable sources without waiting for the apperifier where ever possible (ie lapis is easy)
The question is why are you keeping seeds? I can understand if you keep a few of them at 10/10/10. Once you have them planted on garden soil nothing destroys them. Creepers/mobs dont do damage to the soil.