A 23-year-old Almondbury mum whose toddler son died after he drank from a bottle of toxic plant food has had her 12-month prison sentence suspended for two years.

A judge at Bradford Crown Court this morning told Lauren Booth that no sentence could bring back her two-year-old son Aaron who died in hospital after he drank from a bottle of pH Up which had been left on a window sill at their home in Norris Close, Almondbury in November 2010.

During her trial in February a jury heard how Booth and her then boyfriend had stayed up until 6am and had been asleep in bed when Aaron got his hands on the liquid which could be used for growing cannabis.

After drinking some of the highly caustic substance the toddler suffered fatal internal injuries and Judge Colin Burn today described it as a ''prolonged and frankly horrible death'' which had been preventable.

Booth, who is currently taking parenting classes, was found guilty of causing unnecessary suffering and harm to Aaron by neglect at the end of her four-day trial.

Today Judge Burn said Aaron, who himself was born premature and deaf, was of an age when every new item was a curiosity and a challenge and by failing to move the bottle and failing to supervise him Booth allowed the terrible event to happen.

''I realise that you will always have to live with Aaron's death long after any sentence from this court has been served and that's a very significant factor, it seems to me, that I have to take into account in deciding the appropriate sentence,'' said Judge Burn.

He said the court had a duty to mark such grave offences with imprisonment, but he emphasised that Aaron's death was caused not by a positive act, but by an inaction on Booth's part.

The judge said an immediate prison sentence would result in the public shouldering the burden of locking Booth away in a cell for a period of time when it was clear she posed not danger.

''A prison sentence would not benefit you going into the future with a view to establishing some sort of rehabilitation and getting you to live as an appropriate, adequate and satisfactory parent,'' the judge told Booth.

He said Booth should never have allowed the pH Up to be brought into the same house as Aaron and in his view her boyfriend was most fortunate not to have shared the dock with her at trial.

The court heard that Booth will be subject to supervision by the Probation Service as part of the suspended sentence.

Her barrister Michelle Colborne QC described Booth as an ''inadequate mother rather than a willfully cruel mother'' at the time of Aaron's death, but she said her client dearly loved her son..

Miss Colborne said Booth had a background of vulnerability and was living alone at the age of 16.

She said at the time her client was incapable of engaging with or trusting anyone in authority and believed there was a ''them and us'' culture.

''What your honour has now before you is a woman who is vastly more mature and more insightful,'' said Miss Colborne.

''She accepts the jury's verdict and she accepts what has been said properly by others about her that one cannot look after a child, either as a single parent or with the help of others, by staying up all night or by being complicit, or effectively doing nothing, and being silent as to activities that are occurring under one's roof.''

Miss Colborne said Booth has been undertaking parenting classes in Dewsbury for the last five or six weeks and any immediate sentence may lead to her losing any future with her daughter, who is currently in foster care.

''That in truth is all she lives for,'' added Miss Colborne.

''You have before you a young woman who is utterly determined to demonstrate to all concerned that even if (her daughter) is not to live with her that she can have future contact with her.''