The diameter of the largest sunflower head ever show was an impressive 82 centimeter ( 32.25 in ) . This enormous sunflower was grown by Emily Martin of Maple Ridge , British Columbia , Canada in September 1983 . Just imagine the plenty of this giant helianthus stand tall , with its massive head proudly displaying its vivacious yellow petal .

As a gardening and landscaping expert , I have seen many helianthus throughout my career , but I have never come across one as remarkable as Emily Martin ’s record - breaking helianthus . The cobwebby size of this sunflower head is unfeignedly awe - inspire and demonstrates the unbelievable electric potential of nature .

helianthus are know for their iconic appearance , with their tall stems and gravid , round heads . The capitulum of a helianthus is actually a cluster of hundreds , or even thousands , of single efflorescence call in florets . These floret are dumbly packed together to make the typical disk embodiment that we associate with sunflowers .

When it comes to the diameter of a helianthus head , it can vary greatly depending on the specific variety and mature conditions . Typically , the ordinary diam of a helianthus head place from 20 to 30 centimeter ( 8 to 12 in ) . However , there have been exceptional cases , like Emily Martin ’s sunflower , where the diam far exceeds this average .

Growing a helianthus with such an impressive head diam requires a combination of favorable broker . Firstly , selecting a sunflower salmagundi that is known for producing orotund heads is essential . variety like ‘ Giant Russian ’ , ‘ Mammoth ’ , or ‘ Titan ’ are pop alternative among sunflower enthusiasts looking to grow big - head up variety .

second , provide the helianthus with optimal originate conditions is important . sunflower flourish in full sun , so selecting a sunny dapple in the garden is important . They also prefer well - draining grease , enriched with constituent matter . tolerable lachrymation and fertilization throughout the produce time of year are necessary to fend for the plant ’s growth and boost the evolution of a great header .

I remember a meter when I endeavor to get sunflower in my own garden . While I did n’t achieve a head word diam as telling as Emily Martin ’s record - breaking helianthus , I was still amazed by the size of it and beauty of the sunflower I grow . It was a rewarding experience to witness the growth and developing of these plant , from tiny seeds to towering stalk with vibrant , pollyannaish heads .

The diam of the large sunflower head ever recorded was an astonishing 82 cm ( 32.25 in ) . Emily Martin ’s achievement in growing such an exceptional sunflower is truly remarkable . This disk - breaking helianthus serves as a will to the unbelievable potential of nature and the beauty that can be found in our gardens .

Caroline Bates