Questions & Answers about Čtyři sazenice jsou na záhonu.
Because sazenice has the same form in the nominative singular and nominative plural.
So by itself, sazenice could mean a seedling or seedlings. In this sentence, you know it is plural because of:
Czech often lets the surrounding words show the number.
After dva, tři, čtyři (two, three, four), Czech normally uses the noun in the nominative/accusative plural.
So:
- čtyři sazenice = correct
- čtyři sazenic = not correct here
But with five and above, Czech usually switches to the genitive plural:
- pět sazenic
That is one of the big number patterns Czech learners have to get used to.