Arduino LCD displaying odd characters - arduino

Question

I'm using the LCD dispaly with the soil moisture sensor and it seems using the following returns an odd set of characters on the first line.
LCD.print("Soil Moisture"); //Print Message on First Row
Although using the following, works perfectly
LCD.print("Water level"); //Print Message on First Row
Also worth noting, its printing correctly to SerialMonitor
Being new to learning Arduino, it feels like a bug to me but I can't be sure.
The whole code is as follows:
// This sketch will use the soil moisture sensor and display the result on the LCD
#include <LiquidCrystal.h>
// include the LCD library
LiquidCrystal LCD(10, 9, 7, 6, 5, 4);
// Set pins as 10,9,7,6,5,4. It might be different for your LCD, check the producer catalog
int potPin = A0; //input pin
int soil = 0;
int percent = 0;
void setup() {
Serial.begin(9600);
LCD.begin(16,2); //Tell Arduino to start your 16 column 2 row LCD
LCD.setCursor(0,0); //Set LCD cursor to upper left corner, column 0, row 0
LCD.print("Soil Moisture"); //Print Message on First Row
delay(1000);
}
void loop() {
// map the values
int soil = analogRead(potPin) ;
soil = constrain(soil, 600, 1023);
soil = map(soil, 600, 1023, 0, 100);
LCD.setCursor(0,1);
//display final numbers
LCD.print(soil);
//print the percent symbol at the end
LCD.print("%");
//wait 0.1 seconds
delay(75);
//wipe the extra characters
LCD.print(" ");
Serial.print("Water level:");
Serial.print(soil);
Serial.println("%");
delay(1000);
}