beartime, LLL says this(you may have seen it before?)
Television commercials will have you believe your baby needs solids for the iron supplement. Your milk has iron in it, and while in small quantities, it's very easily absorbed. Some doctors may want to check your baby's blood for anemia at about nine months. This can put your mind to rest. Breastfed babies rarely become anemic. If you wait until later in the first year to start solids, you can avoid the expense of commercially prepared baby food, or the effort of pureeing your own table food.
An older baby, with a couple of teeth, can handle some food from your straight from your table, simply mash it with your fork, if necessary, add a little water. Avoid dairy, citrus fruits, honey, and eggs until he is about one year of age. Also avoid sugar and salt. Introduce one new food at a time, to be safe. Wait a few days to see how your baby handles it.
If you look for the signs of readiness for solids listed below, you can tell your doctor you are waiting for the baby to tell you he is ready, not going by what the date on the calendar is. Just as we say, for breastfeeding in the early months, "watch the baby, not the clock," so do we also recommend, at this stage, "watch the baby, not the calendar."
Solid foods are not recommended for infants until sometime around the middle of the first year. Prior to that time, an infant's digestive system is not mature enough to digest foods other than human milk adequately.
The American Academy of Pediatrics says, "babies don't need other foods in their diet until somewhere in the middle of the first year of life." This statement is very useful, because it doesn't say your baby needs other food at some specific age. You can let your baby be your guide. And babies will tell you when they are ready for solids, somewhere between 6 and 12 months.
Watch for these signs:
increased nursing that continues for more than a few days and is unrelated to illness or teething;
increased interest in table food while others are eating;
the ability to sit up; absence of the tongue-thrusting reflex so that baby does not push solids out of his mouth;
and an ability to pick up food and put it in his mouth.
Usually there is one meal a day when the family is together and the baby is on someone's lap, in an infant seat or in a high chair. And when you take a bite of food, the baby's eyes follow your fork from the time it leaves your plate until it's in your mouth with a look of, "how could you eat that without giving me some." Or if the baby is on someone's lap, he reaches for food on your plate, puts it in his mouth, and quickly does it again.
There is a time around three or four months when a baby gets really good at grabbing things (like the food off your plate or toys off the floor), but after it goes into the baby's mouth, he really isn't interested in eating it.
Another thing you may want to take notice of, is that your baby may think he/she is ready for solids, may be grabbing food off your plate, and enjoying the new taste. But later in the day, the baby may have an upset tummy, become constipated, or you may see the food come out in the diaper, in the same form as when it went in, completely undigested. Your milk is remains the perfect nutritious food for your baby, until his system is ready for table foods. If you've started solids, you can stop, and try again a few weeks later. Also keep in mind that four months is the bare minimum age at which your baby might be ready for a taste of solid food. It's much more common for a baby to be ready for solids later in his first year. If you are a first time mother, you may be eager to try it. Your own mother and friends may also be excited to help, or discuss it with you. You may be looking forward to meeting this new stage in your baby's life.
Some babies don't lose the tongue thrust instinct until much later, they may have a strong gag reflex, or they may have allergies, and refuse food instinctively. There's a chance your baby won't be ready for solids until eight or ten months, or even later. Rest assured that your milk is still meeting all your baby's nutritional needs at this time. Look at your baby. Is he well filled out, alert, active, healthy, growing? Congratulations! Your own breastmilk and good care is responsible for that. 
hope that helps
ps(hope I havent offended anyone whos started weaning-its different for eveyone, I weaned alex early, but regretted it so want to do baby led weaning if poss this time)