Crocus, Primrose and Bakker are the three biggest sellers mentioned by Royal FloraHolland.
"Given their good reputations and the ease of ordering from home, many Brits order their outdoor plants online."
However, the UK lag behind the rest of Europe in balcony and patio planting, with 15% of plants sold used in this way, compared to 30-35% in other countries.
"They prefer more often to put outdoor plants in the ground in the back garden. That image matches what we see in the British garden centre, where many semi-grown products are sold rather than mature products."
Meanwhile, UK garden centres have experienced their busiest weekend so far this year, as temperatures reached 25 degrees centigrade in some parts of the country. Beckworth and Glendoick were among garden centres to agree that sales were peaking. Peak temperatures are set to fall to 15 degrees this week, with cloudier weather later in the week.
Overall, Easter weekend promises sunshine and some showers on Saturday with temperatures up to 15 degrees. It will be mostly dry, with cooler winds.