CHA secretary Chris Wood said: "We had UK Trade & Investment grants secured but they were for the current financial year.
"Now we need to reapply and we can't apply to the normal source."
He added that the British High Commission in Nairobi was trying to get its grants reinstated. The CHA will not know until April if it has successfully secured the funding it needs for the trip.
The CHA is still aiming to organise a pavilion at the show, which will showcase UK horticultural suppliers to Kenyan growers.
Anton Gurlak, from flower auction website Global Grower, said the flower industry in Kenya had not been badly affected by the violence since the disputed general election, because rioting had affected localised areas within the large flower farming region and planes had still managed to export flowers daily to the UK and the rest of Europe.