ABSTRAK Tanaman katuk tergolong tanaman sayuran bahkan seiring berkembangnya herbal katuk juga tergolong tanaman obat-obatan. Penelitian ini bertujuan untuk mengetahui pertumbuhan katuk akibat berbagai panjang stek yang berbeda. Penelitian dilakukan di Desa Tanggumong, Kecamatan Sampang, Kabupaten Sampang pada bulan Desember 2016 Sampai dengan Mei 2017 dengan menggunakan Rancangan acak lengkap (RAL) dengan 4 perlakuan (panjang stek 20, 25, 30, dan 35 cm) dan diulang 6 kali. Hasil penelitian menunjukkan bahwa perlakuan berpengaruh nyata terhadap jumlah akar, panjang akar, berat basah akar, dan berat kering akar, akan tetapi tidak berpengaruh nyata terhadap persentase bibit hidup, jumlah tunas tumbuh, panjang tunas, jumlah daun, berat basah cabang, dan berat kering cabang. Perlakuan panjang stek 35 cm (PSd) memberikan nilai rata-rata tertinggi pada jumlah akar dan panjang akar. Kata kunci : katuk, stek

ABSTRACT Katuk is a type of perennial shrub plant that can be used as vegetable or medicinal plants. This study aimed to examine the growth of katuk due to different stem of cuttings. The research was conducted in Tanggumong Sampang, from December 2016 to May 2017. The research used Completely Randomized Design (CRD) with 4 treatments (length of cuttings 20, 25, 30 and 35 cm). All treatments were repeated for six replications. The results showed that the treatment had significant effect on root number, root length, fresh weight root, and dry weight root, but there was no significant effect on the percentage of seedling growth, number of emerging bud, bud length, leaf number, fresh weight of branch, and dry weight branch. Stem cutting of 35 cm (PSd) gave the highest average value on the number of roots and root length. Keywords: katuk, stem cuttings

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