How long can kelp grow?

Could you possibly enlighten me on the matter of kelp growth? I'm quite curious about how long these marine plants are capable of attaining in terms of length. Is there a specific limit to their growth, or do they have the potential to continue growing indefinitely, provided the conditions are favorable? It would be fascinating to learn more about the factors that might influence their growth rate and ultimate size. Thank you for your assistance in satisfying my curiosity.