hi guys - know nothing about gardening and plants and please excuse the spelling - planted 3 cordyline australis palms in the 3 corners of the garden of my new build - 2 are coming on really well - growing nice and tall probably 2 metres high - but one has stopped growing thought maybe that i did not dig a big enough hole abd its rooted out but now whats happened is from the centre of the palm leaves, an ugly trifid type stem has emerged - it looks like its going to have flowes on it and its now grown quite long and its not straight its probably a metre long - help ??? do i need to cut it out ? the rest of the palm looks like the 2 i have - leaves are the same and the bark but its just this ugly thing is growing from the centre - all info would be much appreciated