Is Nibbana outside of time and space and could you explain how and why if it is.
I do not recall the Buddha ever teaching the above. The Buddha taught Nibbana is here-&-now (diṭṭhadhammanibbāna); for example in AN 9.51.
Is the prinicple of dependent origination of suffering the same as what happens outside in nature like when a seed is planted then with
enough sunshine and rain etc the flower grows if not what is the
difference between them.
Both the dependent origination of suffering and the causality leading to a flower are examples of "conditionality" ("idappaccayatā") or "law of cause & effect". However, in the original Pali teachings (but not in Mahayana), the term "dependent origination" ("paticcasamuppada") is used or reserved for the arising of suffering.
I heard from a Monk that dependent origination is akaliko or timeless what did he exactly mean with that.
"Akaliko" does not mean "outside of time & space". "Timeless" is a wrong or misleading translation of "akaliko". The word "akaliko" means "immediate" or "immediately effective". Its "immediacy" or "without delay" is what relates "akaliko" is the notion of "time".
Thus, is respect to dependent origination, the term "akaliko", for example, means as soon as there is arising of "attachment", there will be the arising of stress. Or as soon as there is the ceasing of "attachment", there will be the cessation of stress. It means that one condition or cause that leads to the arising of another condition or cause is "not delayed by time". It is "immediate". MN 28 says:
Now this has been said by the Blessed One: “One who sees dependent origination sees the Dhamma; one who sees the Dhamma sees dependent origination.” And these five aggregates affected by clinging are dependently arisen. The desire, indulgence, inclination, and holding based on these five aggregates affected by clinging is the origin of suffering. The removal of desire and lust, the abandonment of desire and lust for these five aggregates affected by clinging is the cessation of suffering.’ At that point too, friends, much has been done by that bhikkhu.”
That dependent origination is "akaliko" is confirmed in MN 38, which says:
Good, bhikkhus. So you have been guided by me with this Dhamma, which is visible here and now, immediately effective, inviting inspection, onward leading, to be experienced by the wise for themselves. For it
was with reference to this that it has been said: ‘Bhikkhus, this
Dhamma is visible here and now, immediately effective, inviting
inspection, onward leading, to be experienced by the wise for
That dependent origination is "akaliko" shows clearly why the Three Lifetimes theory of dependent origination is wrong.